节能减排优化砼抗压强度配合比技术经济分析

Technological and Economic Analysis of Optimized Concrete Compressive Strength Mix Ratio for Energy Saving and Emission Reduction

为了降低普通砼的成本,在保证砼的强度的前提下,基于堆积密实理论,利用超细粉来堵塞砼的微空隙。首先进行了砼的配合比设计,通过室内试验,得出了当超细粉取代7%的水泥,其它原材料用量不改变的情况下,28 d超细粉砼的抗压强度为45.5 MPa,强度提高了116%。利用超细粉不但可以提高砼的强度,还可以降低砼的生产成本,仅1 m^(3)可节省16元。下一步可以考虑调整基料的级配,在保障强度等级不变的前提下,进一步提高超细粉的用量,同时减少水泥用量来提高经济效益。

In order to reduce the cost of ordinary concrete,on the premise of ensuring the strength of concrete,based on the theory of packing density,the ultrafine powder was used to block the micro-gap of concrete.Firstly,the mix ratio of concrete was designed.Through indoor test,it was concluded that when 7%of cement was replaced by ultrafine powder and the amount of other raw materials was not changed,the compressive strength of ultrafine powder concrete for 28 days was 45.5 MPa,and the strength was increased by 116%.Using superfine powder can not only improve the strength of concrete,but also reduce the production cost of concrete,only 1 m^(3)can save 16 yuan.The next step can be considered to adjust the gradation of the base material,under the premise of guaranteeing the strength grade unchanged,further improve the amount of ultrafine powder,while reducing the amount of cement to improve the economic benefit.