1) low sand percentage
低砂率
1.
The results showed that the high strength concrete of C50~C80 can be made directly with low sand percentage, superplasticizer and mineral admixture, and without the addition of cement.
试验结果表明采用低砂率,同时双掺高效减水剂和矿物掺合料时,在不增加水泥用量的前提下,完全可以配制出满足要求的C50￣C80的高强度混凝土。
2) sand ratio
砂率
1.
Research on sand ratio of modified asphalt mixture;
对改性沥青混合料中砂率的研究
2.
Effect of sand ratio on the function of steel ingot milling type steel fibers concrete;
砂率对钢锭铣削型钢纤维混凝土性能的影响
3.
Impact of formation way and sand ratio to the pervious concrete performance
成型方式和砂率对透水混凝土性能的影响
3) sand percentage
砂率
1.
Effects of sand percentage on plastic shrinkage cracking of concrete;
砂率变化对混凝土塑性收缩裂缝的影响
2.
The study of the influence of sand percentage on the workability and strength of concrete;
砂率对砼和易性及强度影响的试验研究
3.
Influence of cementitious materials and sand percentage on High performace Self-Condense Concrete;
胶凝材料和砂率对高性能自密实混凝土的影响
4) sand rate
砂率
1.
this paper has studied,the effect of fly-ash content and sand rate on strength and resistance permeating of CL-in CSO concrete.
研究了砂率、粉煤灰掺量对C50混凝土强度、抗Cl-渗透性的影响。
2.
This paper studies how the concrete can be pumped easily,putting forward that the reasonable sand rate should be parameter with coarse aggregate grain and cement quantity,and then gave reasonable sand rate scope of pumping concrete which has been proved reasonable and practical in theory and practice.
随着现代科学的发展,施工行业正在逐步趋向机械化施工,混凝土的应用越来越广泛,针对此现状对混凝土的可泵性进行研究,提出泵送合理砂率应以粗骨料种类粒径和水泥用量为参数,并给出泵送合理砂率的范围表,从理论分析和工程实践证明是切实可行和合理的。
3.
The influence of aggregate,which distinguish from the maximum dimension,the aggregate grading,different content of needle or plate to sand rate under different B and W/B ,has been investigated in this article.
试验研究了粗集料最大粒径、级配、不同针片状含量以及不同胶凝材料用量和不同水胶比条件下 ,砂率对高强混凝土工作性和力学性能的影响。
6) lowstand sandbody
低位砂体
补充资料：低出生体重儿发生率
低出生体重儿发生率
指某地区年内每100名活产数中，出生体重低于2500g的新生儿发生数之比值。其计算公式为：低出生体重儿发生率＝〓〓某年某地区出生体重〓〓低于2500g的新生儿数〓〓年内该地区活产数〓〓×100%出生低体重儿有因孕龄低，而体重与孕龄相符，其预后与早产儿相似。有孕龄达足月而体重低于2500g者为足月低体重，其预后常不同于早产儿。足月低体重儿死亡率常较早产儿低，即使存活者其智力发育也常较慢，不如早产儿存活者。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条