The effect of temperature on strength – porosity relationship for concrete
Source abstract
Abstract
Abstract In this paper, the unsealed concrete samples are tested to determine the compressive strengths and porosities while hot at various temperatures ranging from 25 to 280 °C. All measurements have been carried out after cooling the of the material. Porosity of the same concrete was measured using high-pressure mercury porosimetry, performed on a set of small-drilled fragments (of the average volume 0.5 cm 3 ) of hardened cement paste. While the concrete at the age of 90 days exhibits expected dependency between compressive strength S and porosity P (i.e., S to be a decreasing function of P ), specimens at the age of 28 days behave exactly conversely in this sense. Consequently, it seems to be that for the latter case the porosity does not influence dominantly the strength of concrete.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Fire effects on concrete materials · Concrete Properties and Behavior · Innovative concrete reinforcement materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (22)
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1. Physical properties of high-performance concrete with admixtures exposed to a medium temperature range 20–50 °C10.1016/S0008-8846(00)00294-5 ↗
2. Effect of temperature on physical and mechanical properties of concrete containing silica fume10.1016/S0008-8846(96)85002-2 ↗
3. Compressive strength and pore structure of high-performance concrete after exposure to high temperature up to 800 °C10.1016/S0008-8846(99)00240-9 ↗
4. Janotka · Mag. Concrete Res. · 2000 · 52 · 39910.1680/macr.2000.52.6.399 ↗
5. Effect of temperature and aging on the mechanical properties of concrete. Part II. Prediction model10.1016/S0008-8846(02)00745-7 ↗
6. Effect of high temperature and cooling regimes on the compressive strength and pore properties of high performance concrete10.1016/S0950-0618(00)00031-3 ↗
7. Effect of prolonged heating at elevated temperatures on the phase composition and textures of portland cement clinker10.1016/S0008-8846(02)00726-3 ↗
8. Physicochemical, mineralogical and morphological characteristics of concrete exposed to elevated temperatures10.1016/S0008-8846(01)00736-0 ↗
9. Taylor · 1997
10. Investigations on the relationship between porosity, structure and strength oh hydrated portland cement pastes I a II10.1016/0008-8846(85)90113-9 ↗
11. Influence of phase composition of hardened binder pastes on its pore structure and porosity
12. Strength and porosity of concrete
13. Effect of temperature on porosity of concrete for nuclear-safety structures10.1016/S0008-8846(01)00516-6 ↗
14. Vodak F, et al. Tables of physical properties of concretes for nuclear-safety structures. CTU Reports, vol. 4. Prague: CTU Publ. House; 2000
15. Mercury porosimetry: an inappropriate method for the measurement of pore size distributions in cement-based materials10.1016/S0008-8846(00)00370-7 ↗
16. Bazant · 1996
17. What causes differences of C–S–H gel grey levels in backscattered electron images?10.1016/S0008-8846(02)00808-6 ↗
18. A model for two types of calcium silicate hydrate in the microstructure of Portland cement pastes10.1016/S0008-8846(00)00257-X ↗
19. Physico-chemical parameters determining hydration and particle interactions during the setting of silicate cements10.1016/S0167-2738(97)00386-X ↗
20. Porosity, pore structure and strength of cementeous composites (in Slovak)
21. Concrete behaviour in Mochovce reactor envelope at temperatures up to 200 °C
22. Thermo-mechanical properties of Penly reactor envelope at temperatures up to 200 °C10.1007/BF02905068 ↗