本研究活性粉混凝土以控制組作比較針對不同含水量(0%，100%)，以不同鋼纖維(0%，1%，2%)、矽砂含量(VS/VC=1.6，1.8，2.0)及養護溫度(25℃、55℃、85℃及溼度95%)進行熱學、力學、SEM及MIP試驗。
研究結果顯示：(1)鋼纖維的添加對抗壓強度、超音波波速、動彈性模數、動剪力模數及柏松比有提升之作用，而在熱學性質方面則也是有效之增加熱傳導及熱擴散係數，但比熱值隨之降低。(2)不同矽砂含量在25℃及55℃溫度養護下，力學性質隨矽砂含量增加而增加，但在85℃則有相反之趨勢。(3)不同矽砂含量在25℃及55℃溫度養護下，所有熱學性質隨矽砂含量增加而增加。養護溫度為85℃時，在早期7天齡期熱傳導及熱擴散係數會隨著砂含量增加而降低，到了28天齡期時，反而會隨著砂含量增加而增加，VS/VC=1.8時比熱最低。(4)含水量0%之熱傳導係數、熱擴散係數及比熱，較飽和含水量100%低。(5)SEM看出活性粉混凝土微觀結構分佈很緻密，在鋼纖維與漿體間存在一過渡區，形成較多孔隙。(6)MIP試驗中，加入鋼纖維之活性粉混凝土，總孔隙含量較無加鋼纖維多，但孔隙尺寸有較小之情形。

By comparing with the control set, the study presents the experimental results of thermal, mechanical, 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 content (0% and 100%).
Experimental results show that: (1) Compressive strength, UPV, dynamic modulus of elasticity, dynamic modulus of rigidity and 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 increasing of sand content at 25℃ and 55℃. In the condition of curing temperature at 85℃, thermal conductivity and thermal diffusivity decrease with increasing of silica sand content at the age of 7 days, but increase with increasing of silica sand content at the age of 28 days, especially, specific heat is the lowest when sand-to-cement ratio equal to 1.8. (4) Thermal conductivity, thermal diffusivity, and specific heat of specimen at the condition of 0% water content are lower than those at 100% water content. (5) According to the photograph of 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 the test of MIP, there are more porosity in reactive powder concrete with the addition of steel fiber, but the dimension of pore becomes lesser.

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