Standard sand

Some Problems on Liquefaction Tests of Standard Sand

标准砂液化试验的几个问题

Standard sand for testing strength of hydraulic cement mortars

水泥强度试验用标准砂

The Influence on Construction Industry of Revision of National Standard Sand for Building

国标《建筑用砂》修订对建筑施工的影响

The innovational designs for China ISO standard sand plant

中国ISO标准砂厂的创新设计

Small-strain behaviour of standard sand by stress path controlled triaxial tests

标准砂小应变特性的应力路径三轴试验研究

Analysis for pore water pressure increment of saturated standard sand under deviatoric stress consolidation

偏压固结下饱和标准砂孔压增量分析

Study on the quality and particle shape of the substituted ISO standard sand on the cement mortar strength

代用ISO标准砂材质和颗粒形状对水泥胶砂强度的影响

The Comparing Experiment on Fly Ash Water-proportion with ISO and Old Standard Sand

新旧标准砂粉煤灰需水量比对比试验

The diference of steady state between flyash and Fujian standard sand under same initial relative density was compared .

在相同初始相对密实度情况下探讨了粉煤灰与福建标准砂稳态性状的区别。

The mud content of hill sand is higher than standard sand , which has large influence on working performances and the early strength of concrete .

小沙湾黄河大桥地处内蒙古，当地难以找到符合标准的砂和碎石，所选用的山砂含泥量比较高，对混凝土的工作性能和早期强度有较大的影响。

The freeze resistance of sand mortar test sample treated by SAR synthesized in situ under saturate water state is greatly improved than standard sand mortar .

用原位合成高吸水性树脂处理的砂浆试件，饱水状态下其抗冻能力较基准砂浆有较大改善。

Meanwhile , because of the change of fracture aperture and the porosity of standard sand , the retardation of fracture to the heat transfer was reduced obviously .

同时加压后由于裂隙开度变小，填充砂孔隙率降低，裂隙对热量传递的阻滞作用有明显降低。

The initial relative density of the samples for Fujian standard sand was 20 % and 30 % , and for confected flyash was 20 % .

控制配制灰的初始装样密实度为20%；控制福建标准砂的初始装样密实度为20%、30%。

High performance mineral polymer can be prepared while the content of sodium silicate in the alkaline liquid and the standard sand in the solid materials are both kept around 70 % .

硅酸钠水玻璃在液相中的比例约为70%，且标准砂占固相的比例为70%左右时，可制得力学性能良好的矿物聚合材料。

It has been demonstrated that the calculative values of pore water pressure with proposed constitutive relationship are very near the pore water pressures generated in Fujian standard sand samples under corresponding vibrational energy .

试验证明在基于建议的本构关系计算的孔隙水压力值与相应的振动能量下，福建标准砂试样中产生的孔隙水压力很接近。

A new incremental formula for evaluating the pore pressure of the saturated sand under the deviatoric stress consolidation is presented by analyzing the dynamic triaxial tests of the Fujian standard sand . 1 formula .

通过对饱和福建标准砂动三轴液化试验现象的系统分析，提出了一个偏压固结下孔压增量计算公式。

The green sand ingredient and compactability fast testing unit , made up of an automatic sampling machine and a testing slave , is developed to prepare a standard sand specimen and test conductive parameters automatically .

研制了由自动制样机构和测试下位机构成的湿型砂组分及紧实率快速测试单元，可完成标准砂样的制作和紧实率、导电参数的自动测量。

The orthogonal direct shearing experiment between building sand , standard sand , silt , clay and concrete interface , smooth metal interface , rough metal interface was conducted with a DSR-1 high-pressure shearing system .

在DRS-1型微机高压直残剪试验系统上进行了建筑砂、标准砂、粉砂和粘土与混凝土界面、金属光滑界面、金属粗糙界面的正交直接剪切试验。

The research sults reveal that the water demand and the strength at the same water / cement ratio and cement / sand ratio differ with the quality and particle shape of the substituted ISO standard sand .

研究结果表明，代用ISO标准砂的材质和颗粒形状不同，使相同水灰比和胶砂比的水泥胶砂的用水量和强度表现各异。

Using mechanical dynamic triaxial test apparatus and electro-hydraulic dynamic triaxial test apparatus , liquefaction tests of a saturated standard sand were conducted in order to compare the effects of apparatus type , and sample size on dynamic strength .

用机械式及液压式振动三轴仪进行标准砂的液化试验，以比较仪器型式对动强度的影响；还比较了试样尺寸的影响。

The parameters on the initial deviatoric stress ratio and the orientation of initial maximum principal stress are introduced to the results , an energy model of pore water pressure development for Fujian loose standard sand under complex stress condition is elementarily established .

通过引入考虑不同初始偏应力比和不同初始主应力方向角影响的参数，初步建立了福建标准砂复杂应力条件下的孔压&能量模式。

With the increase in the content of round and curved sand in the substituted ISO standard sand , the water demand decreases and thus the flowability and workability im-proves , while the strength tends to drop down .

随着代用ISO标准砂中圆球状曲面体含量的增多，胶砂用水量减小，流动度增大，和易性变好，但强度却呈下降趋势。

In order to obtain the sand sample of good uniformity and high repeatability , a set of automatic sanding equipment is developed . A series of tests are conducted to study the relative density on the influence of sand flow rate and drop height with Fujian standard sand .

为获得均匀性好、可重复性高的砂样，本文在以往研究成果的基础上，自主开发研制了一套自动撒砂设备，并针对福建标准砂进行了多组装样对比试验。

Through the dynamical test of standard sand specimen during the whole process of high pressure compaction , the rule of springback of sand specimen has been resulted , and the constitutive relationship formulations with respect to specific pressure , bentonite content and compactibility have been derived .

通过标准砂样在高压压实全过程中的动态检测，获得了砂样回弹规律，导出了标准砂样回弹关于压实比压、膨润土含量及紧实率的应力&应变本构关系式。

Based on the traditional technology and heat curing treatment , the reactive powder concrete ( RPC ), which has compressive strength of 200 MPa , was prepared with the raw materials of ordinary Portland cement , ultra pulverized fly ash , silica fume , superplasticizer and standard sand .

采用525普通硅酸盐水泥、硅灰、超细粉煤灰、高效减水剂和标准砂等原材料及湿热养护工艺，可配制出抗压强度达200MPa的活性粉末混凝土。

The research has an important practical effect in producing foundry sand and formulating standard of sand .

该项研究对铸造型砂生产有重要实际意义，且为制定原砂标准提供了科学的理论方法。

A new kind of sand condensate was prepared using bakelite and inorganic clay as main ingredients with standard quartz sand as carrier .

以标准石英砂为载体，由酚醛树脂、无机粘土为主要成分制备出有机-无机复合防砂固砂剂。

The effect of variation of principle stress orientation under cyclic loading on undrained cyclic shear behavior of Fujian Standard loose sand under isotropic consolidation condition is investigated .

针对福建标准砂，在均等固结条件下着重研究了振动过程中主应力方向的不同变化模式对饱和松砂不排水循环特性的影响。

An experimental study on compactness standard of aeolian sand filling in the abutment back

风积砂回填台背压实度标准试验研究

The experiment showed that COD was removed 98 % and more after choosing the suitable coagulant aluminum sulfate and optimizing its dose , and COD , oil content , and suspended solid met State Discharge Standard through the sand filter and activated carbon adsorption column .

实验说明选择合适的混凝剂硫酸铝和优化投药量，混凝浮选后的出水COD可去除98%以上。经砂滤和活性炭吸附后，COD，含油量和悬浮物均可达到排放标准。