河砂

结果表明：河砂和有机材料B对金属离子有较好的吸附作用，滤柱中有机材料B还能促进微生物生长繁殖。

The results showed that rival sand and organic material B can be the good absorption , except that , organic material B can also promote the growth of microorganism .

郯城县河砂资源开发现状及建议

Present Condition and Suggestion of Sand Source Exploration in Tancheng County

人工砂和涂河砂在商品混凝土中的应用

The application of artificial sand and river sand in ready-mixed concrete

花生糠和河砂在烟草漂浮育苗基质中的应用

Application of Peanut Bran and Sand Medium to Tobacco Float Seedling Production

近河砂土地基深基坑支护及地下水控制

Retaining and underground water control during pit excavation in sand ground near river

但是海砂有着与河砂不同的化学成分以及其它掺杂物。

River sand and sand but has different chemical composition and other dopants .

磨细河砂与粉煤灰混掺在碾压混凝土中的应用研究

Study on the Application of Blending Ground River-sand with Fly Ash in RCC

辉绿岩人工砂掺河砂碾压混凝土性能试验研究

Property test and study for RCC of artificial diabase sand mixed with fluvial sand

河砂石灰三合土强度与破坏分析

Analysis of Strength and Rupture of Lime-soils

三角洲平原网状河砂体的地质概念模型及修正

The geological concept model of braided channel sand body in delta plain and its modification

辫状河砂体储层沉积学研究&以张家口地区露头砂体为例

Reservoir Sedimentology of Braided River Sandbodies ── A case study of the outcrop in Zhangjiakou Region

河砂资源过度开采对水环境的破坏暨环境地质问题&以山东大汶河河砂开采为例

The negative effects on water environment and environ-geological problems from excessive exploitation of river sand resources

污泥颗粒与河砂混合流化特性的实验研究

The Minimum Fluidization Characteristics of Mixture of Sludge Pellets and River Sand in a Fluidized Bed

地质年代、结构.曲流河砂体三维构型地质建模及数值模拟研究

A geological age , formation Study on 3D architecture geology modeling and digital simulation in meandering reservoir

工业废渣粉煤灰或河砂一般被用来作为硅质材料。

The industry waste slag fly ash or the river sand is used as the siliceous material .

另外一方面，过度开采河砂导致生态环境的严重破坏。

On the other hand , over-exploitation of river sand can cause serious damage to the ecological environment .

结果表明：机制砂与河砂泌水率随静置时间成对数关系变化；

The result shows that the bleeding rate of manufactured-sand and river-sand changes in logarithm relation with stewing time ;

在道路工程建设中，无论是路基结构还是路面结构所使用的细集料一般都是河砂。

In road construction , whether or pavement subgrade structure of fine aggregate used are generally of river sand .

在1：1.3～1：1.4的坝坡下，面板坝垫层料掺天然河砂是不可取的；

The cushion material for the RC faced rockfill dam mixed with the natural river sand is not recommended .

郯城县河砂资源丰富，砂质优良，主要集中分布于沂河和沭河内。

Sand resource with good quality is very rich in Tancheng county , which mainly concentrates in Yihe and Shuhe river .

采用河砂和营养土两步炼苗，移栽成活率可达90%以上。

River sand and humus were used in two successive steps , and the survival rates was more than 90 % .

试验后测定碳化深度和混凝土不同深度处自由氯离子含量，并与河砂混凝土进行对比。

Finally carbonation depth and free chloride content of concrete in different depths were determined . and compared with river sand concrete .

通过对该砂岩露头精细描述和沉积构形分析，阐明了粗粒曲流河砂体的内部构成。其岩性相类型有块状或层状砂砾岩相；

The depositional architecture of coarse meandering river sandstone body has been displayed by detailed description and architectural analysis of the outcrop .

由于河砂资源的紧缺，海砂已经越来越多的被应用于工业民业建筑中。

Because of the lack of river sands , sea sand has been more and more applied to the industrial and residential buildings .

以廉价的河砂为滤料，研究了接触氧化装置对铁的去除效果。

Cheap sand was used as filtration material in the biological contact oxidation filter to study the effects of Fe removal under different conditions .

将腐熟花生糠与河砂以不同比例混配成基质，研究其在烟草漂浮育苗上的使用效果。

Application effects of medium with different proportion of rotten peanut bran and sand were studied in tobacco seedling raising in the floating system .

河砂资源的稀缺，导致河砂市场价格的上涨，甚至出现垄断价格、集体涨价等现象。

Scarce resources of river sand , river sand leading to rising market prices , or even monopoly prices , prices and other collective phenomena .

本文研究了废轮胎橡胶粉作为细集料取代部分河砂分别对水泥砂浆和水泥混凝土物理力学性能的影响。

The effect on mechanical property of cement mortar and cement concrete were investigated respectively when additive composition of scrap tire powder replaces part of sand ;

随着天然河砂资源的日益紧张，发展人工砂新砂源势在必行。

It is more important to develop new sand sources of the artificial sand , since natural resources of riverine sand have become more and more scarce .

结果建立了辫状河砂体泛连通体、曲流河砂体半连通体的储层砂体沉积模式。

Results The model of the fluvial facies sand-body sediment the extensive connecting body for braid river sang-body and the half connecting body for meandering river sand-body .