夏季使用，可抑制坍落度损失，一般与高效减水剂复配使用。
Summer is used, can inhibit the slump loss, generally is used with high efficiency water reducing agent.
减水率达25%，坍落度损失低，各龄期混凝土抗压强度都有较大提高。
And water reducing ratio of concrete is 25%, slump lose a little. Its every age compressive strength has increased obviously.
提出配置缓凝型减水剂应综合考虑缓凝时间要求、坍落度损失和水泥品种。
It proposed that considerations on retarding time, slump loss and cement kinds are important for retarding plasticizer matching.
这两种复配型减水剂能明显改善混凝土的和易性，降低坍落度损失和提高混凝土抗压强度。
They can remark ably improve the workability, reduce the gradual loss of lump and improve the compressive strength of concrete.
它具有掺量低、减水率高的优点，但与水泥适应性较差和坍落度损失大一直是混凝土生产上的难题。
It has high water reducing rate at low dosage whether the adaptability problem with cement and high slump loss are always the point in concrete production.
该混凝土具有流动性大，坍落度损失小，早期强度高的特点，适合于高层、大跨度的现代建筑结构。
The concrete has the characteristics of large fluidity, low slump loss, and high early strength, and it is suitable for the highrise and long-span building structure.
通过水泥净浆试验比较选择了减水率高、坍落度损失小、与水泥适应性好的氨基苯磺酸盐高效减水剂；
Aminobenzenesulfonic acid super-plasticizer is selected though cement paste test, which be provided with high water-reducing property, low slump loss and good compatibility with cement.
氨基磺酸系高效减水剂asp的减水率高、坍落度损失小，但价格较高、混凝土保水性差，限制了其应用。
ASP has high water-reducing rate and low slump loss, but it is expensive, and the water-retention of concrete is bad, which limit its application.
萘系与三聚氰胺系减水率较低，在低水灰比下流动性较差且坍落度损失较大，不利于商品混凝土的运输和施工。
Serials of naphthalin and tripolycyanamide have low water reducing efficiency, bad flow degree under low water cement ratio and sharp loss of concrete slump.
目前使用的大量萘系高效减水剂存在着坍落度损失大、与水泥的适应性差、易泌水等缺陷，本文运用物理多元复合技术对萘系高效减水剂进行了改性。
Some defects such as quick slump loss, poor compatibility with cement and easy bleeding were found in current use of a great number of naphthalene superplasticizers.
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。
Besides, it effectively maintains fluidity of cement paste and decreases concrete slump loss which is attributed to absorption effect of zeolite to FDN.
在泵送混凝土中掺外加剂，能增加拌合物的流动性并降低泵送混凝土坍落度经时损失。
Mixing admixture in the pumped concrete can increase the mobility of mixture and reduce pumped concrete slump loses through time.
适当的掺量可减少混凝土坍落度的经时损失，提高混凝土强度。
Results indicate that proper quantities of ultra-fine limestone flour can help engineers to decrease the time-loss of concrete slump constant and to increase concrete strength.
试验结果表明，复合使用高效减水剂和缓凝剂，能有效控制混凝土坍落度经时损失。
Experiment results showed that compound use of efficient water-reducing admixture and retarding agent can efficiently control the pumped concrete slump loses through time.
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.
聚羧酸系减水剂具有高减水率和抑制混凝土坍落度经时损失的优点，研究开发新型的聚羧酸系减水剂受到国内外广泛关注。
With the merits of higher fluidity effect and preventing concrete mix from slump-loss with time duration, poly-carboxylic acid series water-reducer agent (WRA) has been widely studying.
聚羧酸系减水剂具有高减水率和抑制混凝土坍落度经时损失的优点，研究开发新型的聚羧酸系减水剂受到国内外广泛关注。
With the merits of higher fluidity effect and preventing concrete mix from slump-loss with time duration, poly-carboxylic acid series water-reducer agent (WRA) has been widely studying.
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