Micro-expansive super early strength modifier for cement and using method thereof

Abstract

The invention relates to a micro-expansive super early strength modifier for cement and a using method thereof. The modifier comprises the following raw materials in part by mass: 30 to 40 parts of CaO, 10 to 20 parts of CaSO4, 45 to 65 parts of C4A3 and 25 to 35 parts of Al2O3. The micro-expansive super early strength modifier is combined with the ordinary portland cement, so that the cement has the advantages that: 'the breaking strength of 12 hours is more than 4.5 MPa; the compression strength of 12 hours is more than 20MPa; the breaking strength of 24 hours is more than 7.5 MPa; the compression strength of 24 hours is more than 30 MPa; the breaking strength of 7 days is more than 12 MPa; the compression strength of 7 days is more than 70 MPa; and the coefficient of linear expansion is more than 0.05 percent'. Compared with the common organic anchoring reinforcement material, the micro-expansive super early strength modifier has the advantage that: the cost of the material is reduced greatly, namely is reduced by over 50 percent on the premise of meeting the requirement of strength.

Description

technical field The invention belongs to the field of building materials, and more specifically relates to a cement micro-expansion super early strength modifier and a using method thereof. Background technique With the rapid construction of my country's transportation and other infrastructure, there are more and more high slope and tunnel projects, anchoring and reinforcement construction are becoming more and more frequent, and the amount of anchor filler and reinforcement materials is also increasing. However, due to the high efficiency Anchor filling materials and reinforcement materials are expensive, in order to save costs, ordinary mortar materials are usually used As the consolidation filling material for anchor rods and planting bars, ordinary mortar shrinks during the hardening process, which has a great impact on anchorage. It will have a great negative impact with the effect of planting bars, and generally cannot achieve the expected design effect. At prese...

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Problems solved by technology

However, due to its own performance limitations, ordinary cement concrete repair materials cannot meet the requirements of rapid, efficient and economical materials for pavement repair.