Under the conditions of higher water-cement radio, a certain consistency FDN high-range water reducer and hermetic surrounding, the cement paste did not set in a long time.
在较大水灰比，一定浓度FDN高效减水剂及密闭条件下，上层水泥浆体会长时间不凝结。
The concrete strength test was conducted with the concrete made of fly ash, cement and sand plus a certain high efficient water reduction agent FDN and the orthogonal design method.
采用粉煤灰、水泥、砂石，掺加一定量的高效减水剂FDN，利用正交设计方法安排试验。
Under the conditions of higher water-cement ratio, a certain consistency FDN high-range water reducer and hermetic surrounding, the cement paste did not set in a long time.
在较大水灰比，一定浓度FDN高效减水剂及密闭条件下，上层水泥浆体会长时间不凝结。
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