Dry-mixed mortar

Abstract

The invention discloses a dry-mixed mortar, which comprises the following components in parts by weight: 120 parts of cement, 700 to 800 parts of scree artificial sand, 80 parts of coal ash and 4 parts of additive, wherein the scree artificial sand is made of broken scree through a sand making machine or other sets of equipment; and the fineness modulus of the scree artificial sand is 2.3 to 3.0. The raw material of the dry-mixed mortar is the scree artificial sand; the particle shape and the grading of the scree artificial sand are high, and the moisture content is low, so that the scree artificial sand can be used for preparing the dry-mixed mortar without being dried; and moreover, the hardness of the scree artificial sand is greater than that of rock artificial sand, so that the dry-mixed mortar is low in cost and high in quality and has obvious economic benefit.

Description

technical field [0001] The invention relates to the field of mortar, in particular to a dry-mixed mortar. Background technique [0002] Mortar is a widely used material in construction engineering, and is widely used in masonry structures, reinforced concrete structures and other projects. In the past, due to the use of sintered bricks (red bricks, etc.) The on-site mixing mortar is difficult to meet its needs, and the quality of the on-site mixing mortar is unstable. my country began to introduce ready-mixed mortar technology from abroad at the end of the 20th century, and issued a number of local and industry-related standards. In 2007, the industry promulgated the Standard "Ready Mixed Mortar" (JG / T230-2007). This standard defines ready-mixed mortar as the mortar mixture that is intensively produced by professional factories and transported to the use site. According to the product form, it can be divided into two types: wet-mixed mortar and dry-mixed mortar. [0003] We...

AI Technical Summary

Problems solved by technology

However, most of the current machine-made sands use rocks as raw materials, which have high water content. They still have to go through drying procedures during use, and the cost of dry-mixed mortar has not been reduced. At the same time, compared with natural sand, rock-made sand has lower hardness than natural sand. Sand, and the grain shape of the machine-made sand is not good, there are too many needle flakes, the content of stone powder varies greatly, it is difficult to control, and the gradation is not good, so the workability and strength of the prepared dry-mixed mortar often cannot meet the standard

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