水灰温度对寒区水泥物理力学性能影响的试验研究

Experimental Study on the Influence of Water-Ash Temperature on Physical and Mechanical Properties of Cement in Cold Region

为了解水泥出罐温度对水泥早期物理力学性能的影响,通过控制水泥使用温度及拌和用水温度,进行了12组水泥标准稠度用水量试验及16组水泥胶砂强度试验,结果表明,随着水泥出罐使用温度的升高,使用常温水(17℃)和冷水(5℃)的水泥标准稠度用水量都会增加,但使用冷水时标准稠度用水量相对较小;水泥早期力学性能也会随着出罐使用温度的升高而降低,但冷水拌和时具有更高的早期力学性能;在水泥试件长期养护条件下,拌和水温及水泥出罐使用温度对水泥的力学性能影响不明显。寒区工程中,当水泥出罐使用温度过高时,可使用温度较低的地下水进行拌和,以避免水泥拌和物过于干燥并有效提高水泥早期力学性能。

To understand the effect of the outlet temperature on the early physical and mechanical properties of cement,12 groups of water consumption tests for cement standard consistency and 16 groups of cement mortar strength tests were carried out by controlling the temperature of cement use and mixing water.The results show that with the increase of the temperature of cement outlet,the water consumption for cement standard consistency using normal temperature water(17℃)and cold water(5℃)will increase;however,the standard consistency of water consumption is relatively small when using cold water.The early mechanical properties of cement will also decrease with the increase of the outlet temperature,but it has higher early mechanical properties when mixed with cold water.Under the long-term curing conditions of cement specimens,the mixing water temperature and the outlet temperature of cement have no obvious influence on the mechanical properties of cement.In the cold region project,when the outlet temperature of the cement is too high,the groundwater with lower temperature can be used for mixing,which can avoid the cement mixture being too dry and effectively improve the early mechanical properties of the cement.