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人工拌合混凝土操作步骤是什么?

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正确答案:

拌和板应保证平整、光滑、不渗水,一般宜采用大块钢板,如用木板时,应将表面刨光,镶拼严密不漏水,拌和时必须放平,防止水泥浆外流。拌和前,应将拌和板上的泥污及旧灰浆等清除干净。进行拌和时,先将砂子倒在拌和板上,并大致摊平;再将水泥倒在砂上,反复干拌直到颜色均匀为止 (至少拌三遍 ) ;再将石子倒入,干拌一遍,水加完后湿拌若干遍 ( 一般 3~ 5遍) ,拌至颜色一致,石子与水泥砂浆没有分离或不均匀的现象为止。

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