问题 单项选择题

关于建筑地面基层铺设的说法,正确的是()。

A.室内地面的水泥混凝土垫层,应设置纵向缩缝和横向缩缝;横向缩缝间距不得大于6m,纵向不得大于12m

B.砂垫层厚度不应小于60mm;砂石垫层厚度不应小于80mm,碎石垫层和碎砖垫层厚度不应小于l00mm

C.炉渣垫层采用水泥、石灰与炉渣的拌合料铺设时厚度不应小于80mm,使用前应用石灰浆或用熟化石灰浇水拌合闷透;闷透时间不得少于3d

D.有防水要求的建筑地面必须设置防水隔离层,楼层结构采用现浇混凝土或整块预制混凝土板,楼板四周除门洞外均应做混凝土翻边,高度不小于200ram

答案

参考答案:D

单项选择题
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