地下室防水
Basement waterproofing
一、地下抗渗混凝土结构自防水。
1. Self-waterproofing of underground impermeable concrete structures.
1、地下防水混凝土抗渗等级为0.6Mpa地下室底板大体积防渗混凝土，施工要求连续不间断，不能留施工缝，一次连续浇筑成功。
1. The impermeability grade of underground waterproof concrete is 0.6Mpa. The large volume impermeable concrete of basement floor requires continuous construction, which can't leave construction joints and is successfully poured at one time.
为确保防水砼的施工质量及防水性能，防止裂缝，在施工时要采取以下主要技术措施。
In order to ensure the construction quality and waterproof performance of waterproof concrete and prevent cracks, the following main technical measures should be taken during construction.
2、抗渗砼配合比设计
2. Mix proportion design of impermeable concrete
商砼厂家提前进行混凝土配合比设计、实验工作。并要专业热工工程师进行热工计算，以优化最佳砼配合比，将水泥用量降到最低。同时有针对性的提出防止砼裂缝的预防措施。为降低水泥水化热，尽量选用不带R的水泥。每立方砼的水泥用量宜控制在300㎏以内，尽量降低水化热量，预防湿度裂缝发生。
Commercial concrete factories carry out concrete mix design and experimental work ahead of schedule. Professional thermal engineers are required to carry out thermal calculation in order to optimize the best concrete mix ratio and minimize the amount of cement used. At the same time, the prevention measures to prevent concrete cracks are put forward. In order to reduce the hydration heat of cement, the cement without R is chosen as far as possible. The cement dosage of each cubic concrete should be controlled within 300_to minimize the hydration heat and prevent the occurrence of humidity cracks