HolzSchabe Testing of Material Properties P. Matiasovsky

Transcription

1 Schaum- Betonmischung HolzSchabe Testing of Material Properties P. Matiasovsky RPIC USTA Malacky RCH SAV 1

2 Introduction Institute of Construction and Architecture, Slovak Academy of Sciences Mechanical properties Thermal properties Durability Airborne sound insulation Heat of combustion and fire resistance. 2

3 1. Mechanical properties Compressive strength Flexural strength Resistance to withdrawal of anchor element 3

4 Determination of compressive strength Test standard: STN EN Testing of hardened concrete, Part 3: Compressive strength of test specimens 4

5 Compressive strength Ord. nr. Bulk Density (kg.m -3 ) Force F max (kn) Stress f cc,max (MPa) Average

6 Determination of Flexural strength Test standard: STN EN Testing of hardened concrete, Part 5: Flexural strength of test specimens 6

7 Determination of flexural strength Ord. nr. Bulk Density (kgm -3 ) Force F max (kn) Stres s f ct,max (MPa ) Stres s f cc (MPa ) St.de v. Aver age

8 Stress-strain curves: total deflection a(tot)/longitudinal deformation vs loading force F 8

9 Determination of resistance to withdrawal of anchor element Test standard: STN EN 320 ( ) Fibreboards. Determination of resistance to axial withdrawal of screws 9

10 Resistance to withdrawal of anchor element 10

11 Resistance to withdrawal of anchor element Ord. nr. Wood screws (mm) Force F w,max (N) Mode of failure 1) 1 4.8x B B B B B 6 604* A* Average 1498 St. dev 267,2 A collapse of glue, B failure of the basic material, C withdrawal of the screw *) The specimen 6 was not included into the evaluation 11

12 2. Thermal properties and durability Thermal conductivity Moisture content during testing Bulk density Water absorption Swelling in thickness Frost resistance 12

13 Determination of the thermal conductivity coefficient 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

14 Guided hot-plate method 14

15 Thermal conductivity 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 = /A [W/m 2 ] Thermal resistance of specimen [m 2.K/W] Thermal conductivity [W/(m.K)] Average thermal conductivity of three specimens [W/(m.K)]

16 Determination of bulk density Standard: STN EN Concrete prefabricates. Wood chip concrete. Requirements and test methods,

17 Bulk density Specimen Mass (g) Dimensions (cm) Volume (cm 3 ) Bulk density (kg/m 3 ) Conditioned specimens at constant mass before drying Average value 403 Standard deviation 7.8 Dried specimens Average value 338 Standard deviation

18 Determination of the moisture content (mass) Standard: STN EN 322 Wooden boards. Determination of moisture content,

19 Moisture content Specimen M H (g) M O (g) H (% hm.) Average value 20.8 Standard deviation 0,13 19

20 Determination of water absorption Test standard: STN Particle boards. Determination of water absorption,

21 Specimen m 1 (g) Water absorption m 2-2hrs (g) A W -2hrs (% wt.) m 2-24hrs (g) A W -24hrs (% wt.) Average

22 Determination of swelling in thickness after immersion in water Test standard: STN EN 317 Particleboards and fireboards: Determination of swelling in thickness after immersion in water,

23 Swelling in thickness after immersion in water Specimen T1 (mm) T2 (mm) G t (%) Average

24 Determination of frost resistance Test standard: STN EN Precast concrete products Concrete with wood-chips as aggregate requirements and test methods,

25 Frost resistance Specimen IM (g) FM (g) LM (%) Average

26 3. Airborne sound insulation Airborne sound insulation of building elements according to STN EN ISO

27 Test wall 27

28 The airborne sound insulation index evaluated according to STN EN ISO Rw(C, Ctr) = 40.5 (-1.5; -3.6) db 28

29 4. Heat of combustion and fire resistance STN EN ISO 1716:2003 Reaction to fire tests for building products. Determination of the heat of combustion 29

30 Heat of combustion The specimen HolzSchabe in the calorimeter pressure container, in the high pressure oxygen atmosphere has achieved the total combustion heat of (6.903±0.069) MJ.Kg-1 30

31 Fire resistance STN EN ISO STN EN 13823: 2003 STN EN :

32 Fire resistance test wall 32

33 Fire resistance test result 33

34 Conclusions Mechanical and thermal properties of the material satisfy its application as the thermal insulation material for external walls of residential buildings From the durability aspect the material is sensitive to water. Therefore its application in the external structures is conditioned by providing the covering layers at external and internal surfaces The sound insulation and fire resistance properties of the material are satisfactory 34