Study on How to Determine the Methylene Blue (MB) Value of Machine-made Sand and Its Effects on Admixture Dosage and Compressive Strength of Concrete

Abstract

Machine-made sand is a raw material commonly used in concrete production, and its quality has a very obvious effect on the performance of concrete. This paper conducted an experiment to determine the methylene blue (MB) value of machine-made sand, explored the effects of the value changes on the admixture dosage and compressive strength of concrete, and analyzed the mineral components of machine-made sand. The research results show that the mud dosage in machine-made green sand is relatively higher, and the admixture dosage increases along with the increasing of the MB value. The mixing of different types of machine-made sand has a certain effect on the compressive strength, which reaches the peak at a certain ratio.