Activity Testing and expert evaluation of construction mixtures test protocols

Transcription

1 Institute of Construction and Architecture Slovak Academy of Sciences Dúbravská cesta 9, Bratislava 45, Slovakia Tel., Fax: Projekt HolzSchaBe. N Activity Testing and expert evaluation of construction mixtures test protocols Completed by: Peter Matiašovský Introduction The following tests were carried out: mechanical properties, thermal properties and durability. 1. Mechanical properties The following parameters have been determined: The compressive strength The flexural strength The resistance to withdrawal of anchor element 1

2 Institute of Construction and Architecture Slovak Academy of Sciences Dúbravská cesta 9, Bratislava 45, Slovakia Tel., Fax: Projekt HolzSchaBe. N Place of work: Department of structures T E S T R E P O R T Determination of compressive strength of the woodchips foam concrete composite Name and address of the customer: RPIC Malacky Bernolákova 1/A Malacky Test standard: STN EN Testing of hardened concrete, Part 3: Compressive strength of test specimens Characterisation of test composite: woodchips foam concrete Obligatory data: a) identification of test specimens Test cubes with the nominal dimensions of 150x150x150 mm were provided by the investor. Four specimens were tested, the basic material of which were wood chips. The investor does not supply the exact composition of the composite including adhesive. b) nominal dimensions of the test specimens or actual dimensions The test specimens were manufactured in the steel moulds; the measured size divergences meet the requirements of the normative regulations. Therefore the nominal values were applied by the evaluation. c) surface condition of the test specimens in the time of the test The surface of the specimens was smooth, dry, corresponding to the composition of the basic material, the side edges were parallel, and the load surfaces were perpendicular to the direction of the axial loading. 2

3 d) details on the abrasion or the evening up On account of the geometrical characteristics of the test specimens they were not carried out. e) date of tests The date of the manufacturing of the test specimens and the date of their test is given in Tab. 1. f) achieved maximum force in kn The achieved maximum experimental forces are given in Tab. 1. g) compressive strength of the test specimens The achieved maximum experimental compressive stresses are given in Tab. 1. h) unaccustomed type of the failure It is not relevant to comment this question because an atypical building material was tested the failure of which is not stated in the referred standard. i) deviations from the standard method They were not observed. j) declaration of the worker technically responsible for the tests The performance of the tests and their evaluation conforms to the referred standard. Supervisor Ing. Martin Križma, PhD. Tab. 1 Compressive strength, F max maximum achieved force, f cc,max maximum stress, Denomination Date of Date of Bulk Force Stress Ord. nr. of the manufacture test Density specimen ρ F max f cc,max (MPa) (kg.m -3 ) (kn) 1 STB-P STB-P STB-P STB-P Average Fig. 1 Compressive strength test 3

4 Institute of Construction and Architecture Slovak Academy of Sciences Dúbravská cesta 9, Bratislava 45, Slovakia Tel., Fax: Projekt HolzSchaBe. N Place of work: department of structure T E S T R E P O R T Flexural strength of the test specimens Name and address of the customer: RPIC Malacky Bernolákova 1/A Malacky Test standard: STN EN Testing of hardened concrete, Part 5: Flexural strength of test specimens Characterisation of test composite: wood chips foam concrete Name of testing institute: Institute of Construction and Architecture SAS Dúbravská cesta Bratislava Obligatory data: a) identification of test specimens b) Test prisms with the nominal dimensions of 150x mm were provided by the investor. Five specimens were tested, the basic material of which were wood chips. The investor does not supply the exact composition of the composite including adhesive. b) nominal dimensions of the test specimens or actual dimensions 4

5 The test prisms were manufactured in the steel moulds; the measured size divergences meet the requirements of the normative regulations. Therefore the nominal normative values were applied by the evaluation. c) details on the possible treatment by abrasion The surface of the specimens was smooth, dry, corresponding to the composition of the basic material, the side edges were parallel, and the load surfaces were perpendicular to the direction of the axial loading. The treatment of the specimen s sides was carried out by plaster layer on the ground of the fastening of the longitudinal deformation gauges. d) type of testing device, loading by two/one load Testing device servo-hydraulic loading machine of the firm SCHENCK, applied load cell 63 kn. The four point tests were performed, the method and the velocity of loading complied with the normative regulations. For the registration of the vertical strains 4 inductive transducers were employed 2 transducers over supports with the range of +/- 1mm, 2 transducers between supports with the range of +/- 2 mm. The longitudinal deformations were registered by the two-limit transducers with the capacity of +/-2,5 mm on the nominal base of 200 mm. e) moisture condition of the specimen surface in the time of tests (saturated/moist) The surface of the test specimen was dried, homogenous, details given in the study RNDr. Ľ Bágeľ. f) date of tests The date of the manufacturing of the test specimens and the date of their test is given in Tab. 1. g) achieved maximum force in kn The achieved maximum experimental forces are given in Tab. 1. h) flexural strength of the test specimens The achieved maximum experimental flexural stresses are given in Tab. 1. i) location of rupture, unaccustomed type of the failure In all cases the failure occurred in the zone of the pure bending, see photo documentation. j) appearance of concrete as far as it is unaccustomed The referred material is atypical, visual observation homogenous material without surface defects. k) deviations from the standard method The tests were carried out in agreement with the specified standard. l) declaration of the worker technically responsible for the tests The performance of the tests and their evaluation conforms to the referred standard, Supervisor Ing. Martin Križma, PhD. 5

6 Tab. 1 Flexural strength, F max maximum achieved force, f ct,max maximum flexural stress, f cc compressive strength on stubs (stressed area A c = (150x150)mm Ord. nr. Denomination of the specimen Date of manufacture Date of test Bulk Density ρ Force F max Stress f ct,max Stress f cc (MPa) (kgm -3 ) (kn) (MPa) 1 STB-P STB-P STB-P STB-P STB-P St.dev Average Fig. 2 Annexes: a) Stress-strain curves: total deflection a(tot)/longitudinal deformation vs loading force F b) Fig. 3 Flexural strength test 6

7 Institute of Construction and Architecture Slovak Academy of Sciences Dúbravská cesta 9, Bratislava 45, Slovakia Tel., Fax: Projekt HolzSchaBe. N Place of work: department of structure T E S T R E P O R T Determination of resistance to withdrawal of anchor element Name and address of the customer: RPIC Malacky Bernolákova 1/A Malacky Test standard: axial STN EN 320 ( ) Fibreboards. Determination of resistance to withdrawal of screws Characterisation of test composite: wood chips foam concrete Obligatory data: a) Name of testing institute: Institute of Construction and Architecture SAS Dúbravská cesta Bratislava b) Description of the controlled batch The customer RPIC Malacky, approached the Institute of Construction and Architecture SAS (ICASA SAS) as the contractor with a request to verify and determine the resistance of 7

8 the additional anchor elements against withdrawal of the normative or designed wood screws. The additional anchor elements in this case wood pins substantially increase anchoring properties of the basic material the cement composite with the content of wood chips and with the basic characteristic cube strength f cc about MPa. Mainly the mutual contacts of the woodchip boards 50 mm thick are concerned. The company RPIC Malacky set the request to perform the tests in agreement with the regulation STN EN 320 (49 155) provided it was feasible. On the basis of the given requirements ICASA proposed: a modification of the test appliance according to STN EN 320 wood pins : - hardwood of the strength class SI beech according to STN , pins with the diameter of φ 50, layers of wood material perpendicularly to the direction of the wood screw withdrawal, the designed screw (4,8x60) mm will be applied for the pins, to execute the contact pin vs. basic material (wood chips) by means of the glue MKT VM-SF 300, the layer of glue 1 to 1,5 mm the glue is normally available in the market, as the reference and informative tests the experiments were carried out which were focused on the value of the pull out force at the axial tension directly in the wood used for the production of the pins. The number of the tested elements is evident from the under mentioned Tables. The graphic interpretation of the test method is illustrated in the Annexe. c) Name of contractor (or deputy) RPIC Malacky,Bernolákova 1/A, Malacky Manufacturing of the specimens Ing. Plačko. d) Place and date of taking of specimens and persons present The test elements of the basic material were cut from the cubes with the edge of 150 mm, which were delivered in June The manufacturing of the stiffening pins July Present persons: Ing. Martin Križma, PhD. supervision, p. V. Ščepánek execution. e) Overall condition of the controlled batch The specimens of the basic material and also the stiffening pins were manufactured in the laboratories of ICASA with the accuracy of +/-1mm. The perpendicularity of the screws was secured by fixing through the post-mounted drills. f) Type, sort and characteristics of the boards according to the specification in the relevant standards The proposed tests do not comply with the normative regulations; the tests were based on the agreement between the customer and the contractor.. g) Density according to EN 323, humidity according to EN 323 See the results RNDr. Ľ. Bágel h) Nominal dimensions of boards The dimensions of the basic material were 145x145x50 mm, the dimensions of the wood prisms were 50x50x145 mm. The nominal dimensions of the test pins were (diameter) φ 50x50 mm. 8

9 i) Range of the controlled batch The range is evident from Tabs. 1 and 2. j) The description and the range of the selection Given in item b) and in Tabs. 1 and 2. k) Duplicate of the applied cutting plan It was not used, because the specimens of the basic material were taking in pairs of the cubes supplied by the customer. l) Formulation of the test results for each property examined according to the relevant standard The resistance against the withdrawal of the screw in the axial direction was determined according to STN EN 320. As the test was not normative, only maximum achieved loads (forces) F w,max v N are given in Tabs. 1 and 2. m) Average value of each board (batch), overall average value Average value of each board (in this case batch) is given in Tabs. 1 and 2, the overall average value is not presented by reason of the different input data and subsequent distortion of the results. n) Other important data loading device, the way of loading The tests were carried out on the servo electric loading device: AWPMA, WEB Thuringer Industriewerk Rauenistein, 11/2612. On account of by standard prescribed constant loading velocity 10 +/- 1 mm/min the manual operation of the loading device was performed up to the maximum load. Loading scale A N, or B N. o) declaration of the worker technically responsible for the tests The performance of the tests and their evaluation conforms to the referred standard, Supervisor Ing. Martin Križma, PhD. Table 2 presents the results of the pull out tests of the screws in the axial tension out of the wood specimen with the dimensions 50x50x145 mm. Tab. 1 shows the results of the pull out tests of the screws in the axial tension out of the specimens made of wood chips concrete (dimensions: 145x145x50 mm), into which the wood pins were glued. Tab. 1 Wood screw vs material of the insert -oak/basic material, axial tensile strength, F w,max maximum achieved force Ord. nr. Wood screws. (mm) Denomination of specimen Date of manufacture Date of test Force F w,max (N) Mode of failure 1) 1 Dub B 2 Dub B 3 Dub B 9

10 4 4.8x60 Dub B 5 Dub B 6 Dub * A* Average 1498 St. dev 267,2 1) A collapse of glue, B failure of the basic material, C withdrawal of the screw * ) The specimen 6 was not included into the evaluation Tab. 2 Wood screw vs material of the insert oak, axial tensile strength, F w,max maximum achieved force 1) F w,max 5080 N 2) F w,max 5940 N 3) F w,max 5500 N Test: Fig. 4 Axial withdrawal tests, destruction of specimens after testing 10

11 2. Thermal properties and durability The following parameters have been determined: Thermal conductivity Moisture content during testing Bulk density Water absorption Swelling in thickness Frost resistance Fig. 5 View on guided hot-plate device for thermal conductivity measurement, conditioning specimens before testing 11

12 Institute of Construction and Architecture Slovak Academy of Sciences Dúbravská cesta 9, Bratislava 45, Slovakia Tel., Fax: Projekt HolzSchaBe. N Department of building physics TEST PROTOCOL Determination of the thermal conductivity coefficient of the composite (wood chip-foam concrete mixture) 1/09 Name and address of the owner: RPIC Malacky Bernolákova 1/A Malacky Standard: STN EN Thermal performance of building materials and products. Determination of thermal resistance by means of guarded hot plate and heat flow meter methods - Dry and moist products of medium and low thermal resistance Apparatus: The measurements were done by apparatus PMV 01, which is suitable for determination of the thermal conductivity in the range from to 2.0 W/(m K). It is the single specimen apparatus with horizontal orientation. The heated plate is placed on the bottom side. The apparatus has got the compensation against the side loss. The compensation guarantees the temperature profile of the side plates that copy the temperature profile in the specimen. The accuracy of the thermal conductivity determination is 5%. After reaching the steady state, the thermal conductivity λ [W/(m.K)] is computed from the following equation (part 8.2.2): φ d λ = A ( T 1 T 2 ) where φ is the steady state heat flow [W], d is the specimen thickness [m], A is the meter plate apparatus area [m 2 ], T 1 a T 2 are temperatures on the hot and cold plate of the apparatus [K]. 12

13 Tested material: composite (wood chip foam concrete mixture) 1/09, equilibrium bulk density: 410 kg/m 3, dry bulk density: 340 kg/m 3 Number and dimensions of tested specimens: 3 samples, m, thickness 80 mm Test protocol. Determination of the thermal conductivity of composite (wood chip-foamconcrete mixture) 1/09 Maturation of tested specimens before the test: Conditions during the specimens maturation: 47±5% RH, temperature 25±2 C The average thermal conductivity of the tested material λ p and standard deviation of the measurement σ λ were calculated from three samples measurement. The standard deviation σ λ was calculated using the following equation: 1 σλ = n where n is number of the measured samples. n i= 1 ( λ i λ p ) Test results: Specimen 1/09/1 1/09/2 1/09/3 Date of completion of the test Test duration [h] 6:15 6:09 8:06 Specimen thickness [m] Bulk density during the test [kg/m 3 ] Dry bulk density [kg/m 3 ] Relative mass change during test [%] Specimen moisture content during the test[kg/kg] Temperature in the laboratory during the test [ C] Temperature difference T 1 - T 2 [ C] Mean temperature of the specimen during the test [ C] Density of heat flow ϕ = φ/a [W/m 2 ] Thermal resistance of specimen [m 2.K/W] Thermal conductivity [W/(m.K)] 0.128± ± ±0.007 Average thermal conductivity of three specimens [W/(m.K)] 0.133±0.005 Conclusion: The average thermal conductivity of composite (wood chip foam concrete mixture) 1/09 was at moisture content (by mass) from 16% to 21% equal to 0.133±0.005 W/(m.K). Differences between the particular measured values were not significant (less than 8%, whereas the single measurement error was 5%). Worked up by: prom. fyz. Oľga Koronthályová, CSc Date:

14 Institute of Construction and Architecture Slovak Academy of Sciences Dúbravská cesta 9, Bratislava 45, Slovakia Tel., Fax: Projekt HolzSchaBe. N Department of building physics TEST PROTOCOL Determination of the bulk density of the composite (woodchip-foam concrete mixture) 1/09 Name and address of the owner: RPIC Malacky Bernolákova 1/A Malacky Standard: STN EN Concrete prefabricates. Wood chip concrete. Requirements and test methods, 2005 Part 5.2 Dry density Test principle: The bulk density is calculated as constant mass of the specimen divided by its volume. The constant mass is achieved if the results of subsequent weighting in 24 hours intervals don t differ by more than 0.5% of the specimen mass. The conditioning of the specimens to the constant mass took place in airconditioned laboratory. The drying of the specimens was carried on in a ventilated oven at 105±1 C. Duration of the test (duration of drying): 18 days The used oven: Ventilated oven, temperature of drying: 105±1 C. 14

15 Measured material: composite (wood chip-foam concrete mixture) 1/09 Number and dimensions of tested specimens: 3 samples; 0,2 0,2 m, thickness 50 mm Conditioning test specimens before drying: 22 days Conditions during the specimens conditioning in the air-conditioned room: 53±2% RH, temperature 23±1 C. Specimens were conditioned until the constant mass is achieved. Test protocol. Determination of the bulk density of the composite (wood chip-foam concrete mixture) 2/10/1 The bulk density of the tested material was calculated as the mean value of three test specimens. The standard deviation was calculated using the following equation: OH where n is number of measured samples. σ = 1 n n i= 1 ( OH i OH p ) 2 Test results: Specimen Mass (g) Dimensions (cm) Volume (cm 3 ) Conditioned specimens at constant mass before drying Average value 403 Standard deviation 7.8 Dried specimens Average value 338 Standard deviation 5.7 Bulk density (kg/m 3 ) Conclusion: The average constant bulk density of the composite (wood chip-foam concrete mixture) 1/09 was 403±8 kg/m 3. The average dry bulk density was 338±6 kg/m 3. According to STN EN 326-1, part 8 test protocol 8.1 mandatory information, is in this protocol the following parameter of the tested composite stated: Steady moisture content (by mass) of conditioned composite: 20.8%. (Test protocol determination of moisture content (by mass) of composite (wood chip-foam concrete mixture) 1/2009) Worked up by: prom. fyz. Oľga Koronthályová, CSc Date:

16 Institute of Construction and Architecture Slovak Academy of Sciences Dúbravská cesta 9, Bratislava 45, Slovakia Tel., Fax: Projekt HolzSchaBe. N Department of building physics TEST PROTOCOL Determination of the moisture content (by mass) of the composite (woodchip-foam concrete mixture) 1/09 Name and address of the owner: RPIC Malacky Bernolákova 1/A Malacky Standard: STN EN 322 Wooden boards. Determination of moisture content, 1995 Test principle: Determination of the specimen mass loss by its weighting at initial state and after drying to constant mass at 105±1 C; calculation of mass loss in % from the mass of the dried specimen The used oven: Ventilated oven, temperature of drying: 105±1 C. Duration of the test (start end of drying sušenia): Measured material: composite (wood chip-foam concrete mixture) 1/09 Number and dimensions of tested specimens: 3 samples, 0,2 0,2 m, thickness 50 mm Maturing the test specimens before drying: Conditions during maturing the specimens: 53±2% RH, temperature 23±1 C 16

17 Test results: For particular specimen: moisture content H of the test specimen is given in mass % with the accuracy of 0.1%. H is calculated using the relation: H = [(m H m o ) / m o ] 100 where m H initial mass of specimen (g); m o mass of specimen after consatnt dry mass is achieved (g). Test protocol. Determination of the moisture content (by mass) of the composite (wood chipfoam concrete mixture) 1/09 For the composite: The moisture content (by mass) of the tested material was calculated as the mean value of three test specimens. The standard deviation was calculated using the following equation: OH where n is number of measured samples. σ = 1 n n i= 1 ( OH i OH p ) 2 Specimen M H (g) M O (g) H (% hm.) Average value 20.8 Standard deviation 0,13 Conclusion: The average steady moisture content of composite (wood chip-foam concrete mixture) 1/09 was 20.8±0.13 %. According to STN EN 326-1, part 8 test protocol 8.1 mandatory information, is in this protocol the following parameter of the tested composite stated: Average steady bulk density of the composite / average dry bulk density of the composite: 403 kg/m 3 / 338 kg/m 3 (Test protocol Determination of the bulk density of the composite (wood chip-foam concrete mixture) 1/2009) Worked up by: prom. fyz. Oľga Koronthályová, CSc Date:

18 Institute of Construction and Architecture Slovak Academy of Sciences Dúbravská cesta 9, Bratislava 45, Slovakia Tel., Fax: Projekt HolzSchaBe. N Working place: dpt. materials and rheology T E S T P R O T O C O L No.H&R Determination of water absorption of woodchip-concrete-foamed composite Name and address of customer: RPIC Malacky Bernolákova 1/A Malacky Test standard: STN Particle boards. Determination of water absorption, 1980 Designation of composite tested: woodchip-foamed-concrete Data on taking of test specimens: specimens were cutted from boards added by customer Number and size of test specimens: 8 ks mm, 55 mm thickness Production date of boards: Production date of test specimens: Conditioning of test specimens before test initiation: Conditioning of specimens in climate-room: 65±5% R.H., 20±2 C. Specimens were conditioned to constant mass. Constant mass is achieved if results of gradual weighing in interval 24hours are not differ by more than 0.1% of specimen s weight. Princíple of test: Consists in finding of absorption from mass enlargement of test specimens by their fully immersion in water, where they keep certain time at constant temperature. Test specimens of constant mass is 18

19 weighed with allowed error max. 0.1%, at latest 30min after the closure of climatisation. Test specimens are weighed after 2h±5min or 24h±15min from immersion in water. Test conditions: Water bath was placed in climatise room. Water temperature in the box keeps at 20±1 C. Time of maturation of composite (recommended, at test time): 28 days, min. 24 days Test date (start - end): Test protocol No.H&R Test results For individual specimen: absorption of test specimen A w is calculated in % with accuracy up to 1% according to the realtion: A w = [(m 2 m 1 ) / m 1 ] 100 where m 1 mass of test specimen before immersion in water (g); m 2 mass of test specimen after removing from water (g). For full board: absorption of a board is arithmetical mean of all test specimens cutting from this board and is expressed in % at one tenth. Specimen m 1 (g) m 2-2hrs (g) A W -2hrs (% wt.) m 2-24hrs (g) A W -24hrs (% wt.) Average According to STN EN Wood-based panels. Sampling, cutting and inspection. Part 1: Sampling and cutting of test pieces and expression of test results, item7.3, statictical quantities dispersion S 2 W,J and standard deviation S were then calculated. Rozptyl is calculated according formula: S 2 W,J = Σ i=1-m (X ij X J ) 2 / (m 1) where m number of specimens, X ij water absorption, X J aritmetical mean of absorption Estimation of standard deviation (to 8 specimens): S O = R k m where R expansion, i.g. difference between greatest and least value and k m coefficient (to 8 specimens is ) Standard deviation: S = (S 2 W,J)

20 Statistical quantity Absorption after 2 hours 24 hours Expansion R Estimation of standard deviation S O Dispersion S 2 W,J Standard deviation S According to STN EN 326-1, part 8 test protocol, 8.1 assessable informations, in this protocol some additional parameters of tested composite are given: Composite moisture: 21.4 % hm. Bulk density: 410 kg/m 3 / 340 kg/m 3 Tried: RNDr. Ľubomír Bágeľ Elaborated: RNDr. Ľubomír Bágeľ Date: End of test protocol No.H&R

21 Institute of Construction and Architecture Slovak Academy of Sciences Dúbravská cesta 9, Bratislava 45, Slovakia Tel., Fax: Projekt HolzSchaBe. N Working place: dpt. materials and rheology T E S T P R O T O C O L No.H&R Determination of swelling in thickness of woodchip-concrete-foamed composite after immersion in water Name and address of customer: RPIC Malacky Bernolákova 1/A Malacky Test standard: STN EN 317 Particleboards and fireboards: Determination of swelling in thickness after immersion in water, 1995 Designation of composite tested: woodchip-foamed-concrete Data on taking of test specimens: specimens were cutted from boards added by customer Number and size of test specimens: 8 ks mm, 50 mm thickness Production date of boards: Production date of test specimens: Time of maturation of composite (recommended, in test time): 28 days min. 24 days Conditioning of test specimens before test initiation: Conditioning of specimens in climate-room: 65±5% R.H., 20±2 C. Specimens were conditioned to constant mass. Constant mass is achieved if results of gradual weighing in interval 24hours are not differ by more than 0.1% of specimen s weight. 21

22 Princíple of test: Swelling in thickness is determined through measuring of thickness enlargement of test specimen after its fully immersion in water. Devices used: Micrometer according to STN EN 325 Water bath - 20±1 C, ph 7±1 Test date (start - end): Test protocol No.H&R Test results For individual specimen: swelling in thickness G t expressed as percentage of original thickness is determined according to following relation: G t = [(t 2 t 1 ) / t 1 ] 100 where t 1 is the thickness of test specimen before immersion (mm); t 2 is the thickness of test specimen after immersion (mm). The value of swelling in thickness is expressed with accuracy at one tenth. For full board: swelling in thickness of the board is arithmetical mean of all test specimens cutting from this board and is expressed in percentage at one tenth. Specimen T1 (mm) T2 (mm) Gt (%) Average 0.6 According to STN EN Wood-based panels. Sampling, cutting and inspection. Part 1: Sampling and cutting of test pieces and expression of test results, 1998, item7.3 statistical quantities dispersion S 2 W,J and standard deviation S were further calculated. Dispersion is calculated according to formula: S 2 W,J = Σ i=1-m (X ij X J ) 2 / (m 1) where m number of specimens, X ij determined value of swelling in thickness, X J arithmetical mean of swelling in thickness Estimation of standard deviation (to 8 specimens): S O = R k m where R expansion, i.g. difference between greatest and least value and k m coefficient (to 8 vzoriek is ) Standard deviation: S = (S 2 W,J)

23 Statistical quantity Value Expansion R 0.3 Estimation of standard deviation S O Dispersion S 2 W,J Standard deviation S Swelling in thickness of the composite: 0.6 % According to STN EN 326-1, part 8 test protocol, 8.1 assessable informations, in this protocol some additional parameters of tested composite are given: Composite moisture: 21.4 % wt. Bulk density: 410 kg/m 3 / 340 kg/m 3 Tried: RNDr. Ľubomír Bágeľ Elaborated: RNDr. Ľubomír Bágeľ Date: End of test protocol No.H&R

24 Institute of Construction and Architecture Slovak Academy of Sciences Dúbravská cesta 9, Bratislava 45, Slovakia Tel., Fax: Projekt HolzSchaBe. N Working place: dpt. materials and rheology T E S T P R O T O C O L No.H&R Determination of frost resistance woodchip-concrete-foamed composite Name and address of customer: RPIC Malacky Bernolákova 1/A Malacky Test standard: STN EN Precast concrete products Concrete with wood-chips as aggregate requirements and test methods, 2005 Normative Annex A.4 Designation of composite tested: woodchip-foamed-concrete Data on taking of test specimens: specimens were cutted from boards added by customer Number and size of test specimens: mm, 50 mm thickness Date of production: Time of maturation of composite (recommended, at test time): min.20 dní 28 dní Conditioning of test specimens before test initiation: Conditioning of specimens in climate-room: 65±5% R.H., 20±2 C. Specimens were conditioned to constant mass. Constant mass is achieved if results of gradual weighing in interval 24hours are not differ by more than 0.5% of specimen s weight. 24

25 Princíple of test: The serie of freeze-thaw cycles (25) on test specimens in freezer (- 15±2 C) and in water (20±2 C) is done. After cycling completion the decrease in weight is provided and expressed as % of initial mass of the test specimens. Test date (start, end), number of cycles: Conditioning of the test specimens after the closure of cycling: Test protocol No.H&R Test result: LM = [(IM FM) / IM] 100 where LM loss of mass (%), IM initial mass of specimen before initiation of cycling (g), FM final mass of specimen after termination of cycling (g). Values IM, FM and LM of individual test specimens as well as arithmetic mean of LM for full board are given in the table: Specimen IM (g) FM (g) LM (%) Average Frost resistance of the composite as the mass loss LM: % According to STN EN 326-1, part 8 test protocol, 8.1 assessable informations, in this protocol some additional parameters of tested composite are given: Composite moisture: 21.4 % wt. Bulk density: 410 kg/m 3 / 340 kg/m 3 Tried: RNDr. Ľubomír Bágeľ Elaborated: RNDr. Ľubomír Bágeľ Date: End of test protocol No.H&R

26 Conclusions The woodchip concrete foamed composite has mechanical and thermal properties satisfying its application as a thermal insulation material for external wall structures of the residential buildings. From the durability aspect the material is sensitive to a water impact due to its high water absorption. Therefore its application in the external wall structures is conditioned by covering layers at external and internal surfaces. The application of plate materials with a satisfactory water resistance and strength, which would have a character of the lost mould is the best solution. 26