沈阳市第一建筑公司对预拌水泥砂浆二次投料工艺进行了试验。方法是先将砂、水泥和水一次投入搅拌机内,经过一分钟左右搅拌后,再加入粗骨料进行搅拌,制成混凝土。试验表明,采用预拌水泥砂浆二次投料法,可节约水泥用量15%左右,比不减少水泥用量的常规搅拌法,能提高强度30%左右。 Shenyang City, the first construction company on the premixed cement mortar feed process was tested. Method is to first sand, cement and water into the mixer once, after about a minute of stirring, then add coarse aggregate for mixing, made of concrete. Tests show that the use of pre-mixed with pre-mixed cement mortar method can save about 15% of cement, cement than conventional methods do not reduce the amount of cement, can increase the intensity of about 30%.