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首页> 外文期刊>Journal of Residuals Science & Technology >Effects of Fly Ash Content on Properties of Cement Paste Backfilling
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Effects of Fly Ash Content on Properties of Cement Paste Backfilling

机译：粉煤灰含量对水泥浆回填性能的影响

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Fly ash has been considered as an ideal raw material component of cement paste backfilling (CPB) due to its good pozzolanic activity. In this study, the effects of fly ash content (340–420 kg/m3) on the compressive strength, resistivity and microscopic characteristics of CPB were investigated. The results indicated that at the early curing age, the resistivity decreased with increasing fly ash content, while the compressive strength did not vary significantly; at the curing times of 7 d, 14 d and 28 d, the compressive strength exhibited an increasing trend because of the higher content of reaction products and the compaction of pore structure, and the resistivity also increased due to the decreased ionic concentrations of pore solution and the greater resistance to transporting current through the pore network system. Apparently, there existed a linear relationship between the compressive strength and the resistivity of CPB samples.
机译：由于粉煤灰具有良好的火山灰活性，因此它被认为是水泥浆回填（CPB）的理想原料组分。在这项研究中，研究了粉煤灰含量（340–420 kg / m3）对CPB的抗压强度，电阻率和微观特性的影响。结果表明，在早期固化期，电阻率随粉煤灰含量的增加而降低，而抗压强度变化不大。在7 d，14 d和28 d的固化时间，由于反应产物的含量较高和孔结构致密，抗压强度呈增加趋势，并且由于孔溶液中离子浓度的降低，电阻率也有所提高。以及通过孔网络系统传输电流的阻力更大。显然，CPB样品的抗压强度与电阻率之间存在线性关系。

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