Effects of powder content and particle size range of different types of manufactured sand on MB value and mortar fluidity

Abstract

The effects of stone powder content and particle size range of machine-made granite sand, limestone crushed machine-made stone sand, and limestone pebble machine-made sand on MB value and mortar fluidity are compared and studied. It is found that the MB value of granite machine-made sand remains unchanged with the increase of stone powder content in the range of 0%~ 15%, and the limestone crushed stone machine-made sand and limestone pebble machine-made sand increase with the increase of stone powder content. The fluidity of limestone gravel machine-made sand mortar decreases with the increase of stone powder content, and the fluidity of limestone pebble machine-made sand and granite gravel machine-made sand mortar first increases and then decreases with the increase of stone powder content. The reduction range of fluidity of the three mortars from large to small is limestone gravel machine-made sand > granite machine-made sand >limestone pebble machine-made sand. In the range of machine-made sand particle size of 0.075 mm~2.36 mm, with the decrease of machine-made sand particle size, the MB value of granite machine-made sand remains unchanged, and the MB value of limestone gravel machine-made sand and limestone pebble machine-made sand gradually increases. In the range of machine-made sand particle size of 0 mm ~ 2.36 mm, with the decrease of machine-made sand particle size, the MB value of granite machine-made sand remains unchanged, and the MB value of limestone gravel machine-made sand and limestone pebble machine-made sand gradually increases. Relatively speaking, the MB value of limestone gravel machine-made sand increases more. The fluidity of mortar increases with the increase of manufactured sand particle size. Within the same particle size range, the fluidity of three kinds of manufactured sand mortar is limestone pebble manufactured sand > granite manufactured sand > limestone gravel manufactured sand from large to small.