Anti-Crack Performance of Low-Heat Portland Cement Concrete

• 作 者: 杨华全
• 机 构: Changjiang River Scientific Research Institute Wuhan 430010,China
• 出 处: Journal of Wuhan University of Technology(Materials Science
• 发表日期: 2004年期
• 关键词: Portland hydration durability moderate compressive shrinkage dosage mixing modul

The properties of low-heat Portland cement concrete(LHC)were studied in detail.The experimental results show that the LHC concrete has characteristics of a higher physical mechanical behavior, deformation and durability.Compared with moderate-heat Portland cement(MHC),the average hydration heat of LHC concrete is reduced by about 17.5%.Under same mixing proportion,the adiabatic temperature rise of LHC concrete was reduced by 2℃-3℃,and the limits tension of LHC concrete was increased by 10×10-6-15× 10-6 than that of MHC.Moreover,it is indicated that LHC concrete has a better anti-crack behavior than MHC concrete.

The properties of low-heat Portland cement concrete (LHC) were studied in detail. The experimental results show that the LHC concrete has characteristics of a higher physical mechanical behavior, deformation and durability. Compared with moderate-heat Portland cement (MHC), the The average hydration heat of LHC concrete is reduced by about 17.5%. Under same mixing proportion, the adiabatic temperature rise of LHC concrete was reduced by 2 ° C-3 ° C, and the limits tension of LHC concrete was increased by 10 × 10-6- 15 × 10-6 than that of MHC. Moreover, it is indicated that LHC concrete has a better anti-crack behavior than MHC concrete.