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矾土水泥是一种用途广泛的胶凝材料。由于它快硬早强,经常被用于军事工程和堵漏抢险。就石油基建施工而言,基础的二次灌浆,部分承重构件,加热炉隔热衬里以及催化“两器”的部分隔热耐磨衬里都要用到矾土水泥。尤其在北方冬季施工中应用更多。但由于人们对它的特性了解不够,在使用中不严格检验原材料的质量,不注意气候环境的影响,也不管使用地点湿热条件的变化,任意将矾土水泥用到工程上去,以至发生严重的质量事故。如某地浴池7.5米跨度大梁,因急于在春节前竣工,使用矾土水泥混凝土,配筋及混凝土强度均符合设计要求,使用四年多,大梁弯矩最大处出现了3～5毫米裂缝,中和轴上移,
Alumina cement is a widely used cementitious material. Because it is fast and hard early, it is often used for military engineering and leak prevention. For the construction of petroleum infrastructure, bauxite cement is used for the foundation of secondary grouting, part of load-bearing components, insulation lining of heating furnace and part of thermal insulation and wear-resistant lining for catalytic “two devices”. Especially in the northern winter construction more applications. However, due to people’s lack of understanding of its characteristics, the quality of raw materials is not strictly examined during use, and the impact of climate and environment is not paid attention to. Regardless of the changes in the conditions of the hot and humid conditions at the site of use, the use of alumina cement is arbitrarily applied to the project, and even serious Quality accidents. For example, a 7.5-meter span beam in a bathing facility was used to complete the construction before the Spring Festival. The use of bauxite cement concrete, reinforcement and concrete strength were all in line with the design requirements. After using for more than four years, there was a 3 to 5 mm crack in the largest moment of the beam. The neutral axis moves upwards,