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首页> 外文期刊>Cement and Concrete Research >Influence of natural pozzolan, colemanite ore waste, bottom ash, and fly ash on the properties of Portland cement
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Influence of natural pozzolan, colemanite ore waste, bottom ash, and fly ash on the properties of Portland cement

机译：天然火山灰，硬锰矿矿石废物，底灰和粉煤灰对硅酸盐水泥性能的影响

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This study has examined the effect of natural pozzolan (NP), colemanite ore waste (CW), coal fly ash (FA), and coal bottom ash (BA) on the properties of cement and concrete. The parameters studied included compressive strength, bending strength, volume expansion, and setting time. A number of cements were prepared (in the presence of fixed quantity of 10 percent FA, 10 percent BA, and 4 percent CW) by the replacement of Portland cement (PC) with NP in range of 5-30 percent. The results showed that the final setting time of cement pastes were generally accelerated when the NP replaced part of the cement. However, NP exhibited a significant retarding effect when used in combination with CW. The results also showed that the inclusion of NP at replacement levels of 5 percent resulted in an increase in compressive strength of the specimens compared with that of the control concrete. The replacement of PC by 10-15 percent of NP in the presence of fixed quantity of CW improves the bending strength of the specimens compared with control specimens after 60 days of curing age.
机译：这项研究检查了天然火山灰（NP），硬锰矿矿石废物（CW），粉煤灰（FA）和煤灰（BA）对水泥和混凝土性能的影响。研究的参数包括抗压强度，弯曲强度，体积膨胀和凝固时间。通过用5％至30％的NP代替波特兰水泥（PC），制备了许多水泥（存在固定量的10％FA，10％BA和4％CW）。结果表明，当NP代替部分水泥时，通常会加快水泥浆的最终凝固时间。但是，NP与CW组合使用时，显示出显着的阻滞作用。结果还表明，与对照混凝土相比，以5％的替代含量包含NP会导致样品的抗压强度增加。固化60天后，在固定量的连续波中，用NP的10-15％的PC代替PC可以改善样品的弯曲强度。

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