Nghiên cứu tận dụng xỉ măng gan làm nguyên liệu để thay thế đá mạt trong sản xuất gạch bê tông

Abstract

ABSTRACT:

Production and use of nonfired bricks have gradually become popular in Vietnam, in which concrete bricks (GB) are the product with the highest proportion. GB can use various industrial wastes as raw materials in the production and is being promoted to develop by the state. This paper presents the results of research on recycling of manganese slag waste (MSW) in metallurgy industry to replace crushed stone for GB production. The results showed that, the forming moisture and water absorption tended to increase, the density and the compressive strength of the GB
decreased when the MSW content increased. However, it is possible to produce GBs with the grades from M3.5 to M15 according to TCVN 6477:2016, but the density could be reduced 1,215,8% and a lower cost of 5,418,7% compared to the GB being produced in the market. Moreover, the development of this brick production not only contributes to solving the large amount of MSW currently storage, but also reduces 361 tons of CO2/year, energy saving 19 TOE/year compared to the clay bricks production.

Keywords: Nonfired brick (NB); concrete brick (CB); manganese Slag Waste (MSW); crushed Stone (CS); industrial Waste (IW).