论文部分内容阅读
天津化纤厂第三套空分装置分馏塔基础是采用冷箱基础施工的,其中耐低温混凝土是用水泥、泡沫剂和膨胀珍珠岩加水搅拌而成。通过多次试验和施工中的探索,保证了施工质量和设计要求,已经过一年多运转的考验。一、材料1.水泥:不低于425~#的普通硅酸盐水泥,现场实际采用朝鲜220~#水泥。2.骨料:膨胀珍珠岩,粒径0.3～1.2 mm,松散容重不大于65kg/m~3,含水率小于0.5%。3.外加剂:松香皂泡沫剂是用一定量的松香、碱、皮胶并加适量的水配制而成。二、配比水泥:膨胀珍珠岩=1:3(体积比);水灰比:0.7;沉入度:9.7cm;掺入7/10000(占水泥重量)松香皂泡剂。三、混凝土的配制1.先将水与松香皂泡沫剂倒入搅拌机内
The third set of air separation plant fractionation tower of Tianjin Chemical Fiber Plant is based on the construction of a cold box foundation, in which the low temperature-resistant concrete is cemented with cement, foaming agent and expanded perlite with water. Through several trials and explorations in construction, construction quality and design requirements have been guaranteed and it has been tested for more than one year of operation. I. Materials 1. Cement: Ordinary Portland cement not lower than 425~#, actual use of North Korea 220~# cement. 2. Aggregate: expanded perlite, particle size of 0.3 ~ 1.2 mm, loose bulk density of not more than 65kg/m ~ 3, moisture content of less than 0.5%. 3. Additives: Rosin soap foam is prepared with a certain amount of rosin, alkali, skin glue and appropriate amount of water. Second, the ratio of cement: expanded perlite = 1:3 (volume ratio); water-cement ratio: 0.7; sink: 9.7cm; incorporated 7/10000 (cement weight) Rosin soap foam agent. Third, the preparation of concrete 1. First, the water and rosin soap foam into the mixer