Design of mortar distribution using waste materials from masonry walls to make unburnt brick

Abstract

Currently, the situation of illegal sand mining in Vietnam is causing frustration in public opinion. Uncontrolled exploitation is causing great consequences in terms of resource loss, riverbank erosion, crop damage and insecurity in the localities. Since the beginning of 2017 until now, many individuals have organized sand mining in the riverbeds of the Mekong Delta, causing many serious consequences, changing the flow, causing landslides and bank erosion. river. Moreover, the quality of river sand when put into use for construction is not strictly controlled, affecting the quality of the works. Besides, the situation of concrete waste, broken brick wall in the construction industry is very large. This is a dilemma for managers related to environmental pollution and to use these wastes effectively and at a low cost. In addition, Circular No.13/2017/TT-BXD stipulating the use of unburnt building materials in construction works has led to an increasing demand for unburnt bricks. The author conducts an experiment to build a norm for the distribution of materials for the control sample, the sample uses building wall waste material to replace sand at the percentage of 35%; 50%; 100% and samples with the addition of Geopolymer; proceed to shape solid bricks 40x80x180, evaluate the strength and water absorption of bricks. The article has practical significance, contributing to saving money, protecting the environment and making use of construction waste when applied in practice.

Key words: Waste construction wall; crushed sand; unburnt bricks.