Besides, it effectively maintains fluidity of cement paste and decreases concrete slump loss which is attributed to absorption effect of zeolite to FDN.
并且由于其具有FDN缓释效果，还能有效延长水泥的净浆流动度，减少混凝土坍落度的经时损失。
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。
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。
The principle of loading of digital map in the terrain auxiliary navigation is studied. It is concluded that FDN plays an auxiliary role in the process of loading of digital map.
研究了地形辅助导航中数字地图的加载原理及飞行力学导航法在数字地图加载过程中的辅助作用。
On the physical properties, many deferent ingredients of recycled concrete are tried by adjusting concrete mixture ratio including the recycled coarse aggregate, FDN and fly ash.
在再生混凝土基本性能方面：通过采用不同的水灰比、不同的再生骨料的取代率以及不同的减水剂掺进量，配制再生混凝土。
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。
Using sodium hexametaphosphate, FDN and ADS as compound dispersants, the precast bricks bonded by aluminum-gel have good rheological behavior and high ratio of performance to price.
对于以铝凝胶为结合剂的铝镁体系选用六偏磷酸钠、FDN和ADS作复合分散剂，浇注料的流变性能比较理想，性价比较好。
An excellent pumping admixture was made up by use of FDN compounded with calcium lignosulphonate, retarder for controlling slump loss and water retaining admixture for reducing water segregation rate.
FDN与木钙复合，以缓凝剂控制坍落度经时损失，以保水剂降低混凝土泌水率，配制出混凝土坍落度经时损失较小、性能优良的多元复合泵送剂。
An excellent pumping admixture was made up by use of FDN compounded with calcium lignosulphonate, retarder for controlling slump loss and water retaining admixture for reducing water segregation rate.
FDN与木钙复合，以缓凝剂控制坍落度经时损失，以保水剂降低混凝土泌水率，配制出混凝土坍落度经时损失较小、性能优良的多元复合泵送剂。
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