高H元素含量防辐射混凝土制备与性能研究

近年来,防辐射防护混凝土设计要求越来越高,不再单一地要求密度等级.目前防辐射混凝土结合水含量均在4％左右,多为干硬性混凝土,坍落度小,施工不便,难以满足新的核设施辐射防护需要.通过研究制备得到了56d抗压强度>C40,密度>3500kg/m3,坍落度(170～190)mm,H元素含量>30kg/m3的防辐射混凝土.同时...

Preparation and properties of radiation shield concrete with high H element content

In recent years, the design requirements of radiation shield concrete are higher and higher, and the density grade is no longer required alone. At present, the combined water content of radiation shield concrete is about 4%, mostly dry and hard concrete with small slump and inconvenience of construction, which is difficult to meet the needs of radiation shield concrete for new nuclear facilities. In this paper, the radiation shield concrete with 56d compressive strength > C40, density > 3500 kg/m3, slump (170 ~ 190) mm and H element content > 30 kg/m3 is prepared. At the same time, the effects of temperature, water cement ratio and water consumption on the properties of radiation shield concrete are studied by high temperature treatment and adjusting water cement ratio and water consumption.