The Influence of Steel Fiber and Silica Sand Contents on Thermal and Mechanical Properties of Reactive Powder Concrete
| Autor: | Kun-te Lin, 林坤德 |
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| Rok vydání: | 2005 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 93 The study presents the experimental results of thermal properties, mechanical properties, SEM and MIP of Reactive Powder Concrete(RPC) with different steel fiber content (0%, 1%, 2%), silica sand content (VS/VC=1.6, 1.8, 2.0), and curing temperature (25℃, 55℃, 85℃ at relative humidity 95%), on the conditions of two different water contents (0% and 100%). Experimental results show that: (1) Compressive strength, UPV, dynamic modulus of elasticity, dynamic modulus of rigidity, Poisson’s ratio, thermal conductivity and thermal diffusivity increase with increase of steel fiber content, except for specific heat；(2) Mechanical properties increase with increase of silica sand content in the condition of curing temperature at 25℃ and 55℃, but decrease at 85℃；(3) All of the thermal properties improved with increase sand content at 25℃ and 55℃. Specific heat is the lowest when sand-to-cement ratio equals to 1.8；(4) Thermal conductivity, thermal diffusivity, and specific heat of specimen at the condition of 0% water content are lower than those of 100% water content；(5) According to SEM, micro-structure of reactive powder concrete is very dense, but more porosity forms in the transition zone between steel fiber and paste；(6) According to MIP, there are more porosities in reactive powder concrete with the addition of steel fiber, but the size of pore becomes lesser. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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