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近年来,我们进行了一系列温水养护混凝土快速预测标准强度的试验,这些试验对混凝土配合比设计,施工现场混凝土质量控制,配合比调整和确保混凝土工程质量具有一定的实际意义。一、试验情况 1.原材料水泥为天津南仑水泥厂生产的矿渣325号水泥,朝鲜进口山牌、鹿牌425号水泥;碎石为河北滦县石灰石,规格0.5～2.0厘米;砂为北戴河中砂,细度模量2.5,砂率28～37％;使用自来水,水灰比0.4～0.71; 掺粉煤灰(天津第一发电厂排出的湿粉煤灰,烧失量2.5％,4900孔筛余25％左右);
In recent years, we have conducted a series of tests for the rapid prediction of standard strength of warm water-concrete concrete. These tests have practical significance for concrete mix design, concrete quality control at the construction site, mix ratio adjustment and ensuring the quality of concrete works. I. Test conditions 1. The raw material cement is slag No. 325 cement produced by Tianjin Nanlun Cement Plant, North Korea imported Shanpai brand and Luban Brand No. 425 cement; gravel is Lixian, Hebei Province, limestone, specifications are 0.5 to 2.0 cm; sand is Beidaihe Sand, fineness modulus 2.5, sand rate 28 to 37%; use of tap water, water to dust ratio 0.4 to 0.71; fly ash (Tianjin No. 1 power plant discharged wet fly ash, loss on ignition 2.5%, 4900 holes More than 25% of the sieve);