本文通过对一起混凝土质量事故原因的分析,发现聚合氯化铝对混凝土的工作性能存在不良影响,并通过相关的混凝土试配试验验证了这一结论。这一事件提醒广大的混凝土技术人员需要关注随着优质砂石资源日渐短缺带来的各种新问题,通过自身的职业技能分析问题并加以解决,确保混凝土的产品质量。 In this paper, an analysis of the causes of concrete quality accidents found that the polyaluminum chloride has an adverse effect on the performance of concrete, and this conclusion is verified by the relevant concrete test. This incident reminds the majority of concrete technicians to pay attention to the new problems brought by the shortage of high-quality gravel resources, analyze the problems through their own professional skills and solve them, and ensure the quality of concrete products.