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目前普遍采用的普通硅酸盐系列水泥混凝土在负温环境下施工,要想获得早强的效果,必须采取以各种形式供给热能的施工方了建法,施工工艺复杂、能量消耗大,提高筑造价。采用外加剂进行冷作法施工,强度增长也不够理想。近年来,我所在冬施技术研究中,从水泥基材着手,对硫铝酸盐快硬早强水泥的负温特性与负温早强混凝土的配制与应用,进行了研究。在乌鲁木齐市最冷月采用冷法施工,进行了大面积的、连续9小时的现浇钢筋混凝土施工,取得了-6～-16℃环境下采取简单保温措施,混凝土3天强度大于200公斤力/厘米~2,无保温混凝土7天强度大于300公斤力/厘米~2的效果。一、硫铝酸盐快硬早强水泥的抗冻结性
At present, commonly used ordinary silicate series cement concrete is constructed in a negative temperature environment. In order to obtain early strength, it is necessary to adopt a construction method that supplies heat energy in various forms. The construction process is complicated and energy consumption is increased. Construction cost. With admixtures for cold work, the strength growth is not ideal. In recent years, in my research on winter plant technology, starting from the cement substrate, the negative temperature properties of sulphoaluminate fast-hard early-strength cement and the preparation and application of negative temperature early-strength concrete have been studied. In the coldest month of Urumqi, the cold construction method was adopted, and a large-area, continuous 9-hour cast-in-place reinforced concrete construction was carried out. Simple insulation measures were taken at a temperature of -6 to -16°C, and the strength of the concrete was greater than 200 kg for 3 days. /cm~2, no effect of heat-insulating concrete for more than 300 kg force/cm~2 for 7 days. I. Anti-freezing properties of sulphoaluminate fast-hardening early-strength cement