论文部分内容阅读
冬季混凝土施工中,使用三乙醇胺复合早强剂是按混凝土标号和室外大气温度,在搅拌混凝土时,掺入一定量的三乙醇胺、氯盐(氯化钠、氯化钙)和亚硝酸钠,用以提高混凝土的早期强度和抗冻性能,并保证一定的混凝土搅拌出料温度(+15℃左右)。待混凝土浇灌完毕后,在其表面覆盖草袋,作为简单的挡风保温措施。在混凝土搅拌中三乙醇胺用量很少。为了在施工中便于掌握,需先将三乙醇胺按1:3之重量比用水稀释,即1公斤三乙醇胺,加3公斤水,稀释后的比重约为1.02(三乙醇胺的比重为1.12至1.13)。使用时按配合比要求的用量,换算成稀释溶液的体积(或重
In winter concrete construction, the use of triethanolamine composite early strength agent is based on the concrete label and outdoor atmospheric temperature, when mixing concrete, mixing a certain amount of triethanolamine, chloride salt (sodium chloride, calcium chloride) and sodium nitrite, It is used to improve the early strength and frost resistance of concrete, and to ensure a certain concrete stirring temperature (+15°C or so). After the concrete is poured, it covers the surface of the straw bag as a simple measure of wind insulation. Triethanolamine is rarely used in concrete mixing. In order to be easy to grasp during construction, it is necessary to first dilute triethanolamine with water in a weight ratio of 1:3, that is, 1 kg of triethanolamine, plus 3 kg of water, and the diluted specific gravity is about 1.02 (the specific gravity of triethanolamine is 1.12 to 1.13). . When used according to the amount required by the mixing ratio, converted into the volume (or weight) of the diluted solution