【摘要】 通过胶砂试验分析了低热硅酸盐水泥（HBC）与中热硅酸盐水泥在不同龄期强度的区别,掺入不同掺量的磷渣,分析磷渣掺量对HBC早期和后期强度的影响.在磷渣中掺入不同含量的P₂O₅,分析了P₂O₅对常温和增温情况下HBC凝结时间的影响,以及不同含量的P₂O₅对HBC胶砂强度影响.研究发现:HBC早期强度略低于中热硅酸盐水泥,当龄期达到28d后其强度得到充分发挥;HBC早期强度随着磷渣掺量增加而大幅度减小,但龄期达到90d后磷渣掺量对强度的影响减小.磷矿渣粉细度对HBC强度的影响较小;HBC初凝时间在常温下基本不受P₂O₅含量影响,当P₂O₅含量小于3%时,常温终凝和增温初凝、终凝时间均随P₂O₅含量增加而增大.当P₂O₅含量大于3.5%时,P₂O₅含量的增加对HBC凝结时间的影响较小,P₂O₅含量增加同样会减小HBC早期强度.更多还原

【Abstract】 The difference of strength between low heat portland cement（HBC）and medium heat portland cement at different ages was analyzed by mortar test.The effect of phosphorus slag content on the strength of HBC in the early and late stages was analyzed by adding different amounts of phosphorus slag.The effect of P₂O₅ content on the setting time of HBC at room temperature and increasing temperature,and the effect of P₂O₅ content on the strength of HBC sand were analyzed by adding different contents of P₂O₅ into phosphorus slag.It is found that the early strength of HBC is slightly lower than that of medium heat portland cement,and the strength of HBC cement can be brought into full play when the age reached 28 days.The early strength of HBC decreases with the increase of phosphorous slag content,but the effect of phosphorous slag content on the strength decreases when the age reached 90 days.The fineness of phosphate slag powder has little effect on the strength of HBC.The initial setting time of HBC was not affected by P₂O₅ content at room temperature.When P₂O₅ content was less than 3%,the final setting time at ordinary temperature,the initial setting time and final setting time at increasing temperature increased with the increase of P₂O₅ content.When the content of P₂O₅ was more than 3.5%,the effect of increasing P₂O₅ content on setting time of HBC was smaller than that of P₂O₅ content.The increase of P₂O₅ content also decreased the early strength of HBC.更多还原