Sand is mulled (mixed) thoroughly with additives such as bentonite to increase bonding and overall strength.

型砂与膨润土之类的添加剂充分地混合以增强连接及整体强度。

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The present situations of resin -bonded sand used in DFM foundries are introduced. The mechanism and its application of additives for the resin -bonded sand are presented.

介绍了东风公司铸造厂生产用树脂砂的现状，阐述了树脂砂添加剂的作用机理及生产应用情况。

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This result is achieved without thermal processing, additional surface polishing, use of polymeric additives and also without additional grinding of cement and sand.

整个过程无需借助热处理程序、额外的表面刨光，也无需利用聚酯添加剂或对水泥和沙子进行额外的碾压。

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More than 10 drillers have already received Department of Environmental Protection permission to use mine discharges for fracking, a technique in which millions of gallons of water, along with chemical additives and sand, are pumped down a well to break apart gas-bearing shale deposits.

WSJ: Pa. pushes drillers to frack with coal mine water