Binding mortar with light weight and high droop resistance and preparation and use methods

Abstract

The invention provides binding mortar with light weight and high droop resistance, which consists of the following components in parts by weight: 300-450 parts of cement, 40-100 parts of rapid hardening cement, 60-200 parts of lightweight aggregate, 250-450 parts of sand, 50-100 parts of filling material, 15-50 parts of re-dispersible emulsion powder, 3-5 parts of cellulose ether, 2-4 parts of lignocellulose, 0.5-2 parts of retarder and 1-5 parts of thixotropic lubricant. The lightweight aggregates are glass microspheres, or hollow glass microspheres or ceramsite sand, of which the particle size is below 1.2mm and loose bulk density is below 0.8Kg/L. The invention has lower mortar density, good droop resistance, lower thermal conductivity and certain thermal insulation performance; the binding mortar can be hardened quickly, and the requirement of carrying out subsequent construction quickly is satisfied; the elastic modulus of the mortar is small, and deformation resistance is strong; and the mortar uses multiple polymer additives, and base materials have strong adaptability and strong binding performance.

Description

technical field [0001] The invention relates to a kind of mortar, in particular to a light-weight high-sag-resistant adhesive mortar and its preparation and use methods. Background technique [0002] The traditional cement-based bonding mortar mainly focuses on the bonding performance of the mortar. In response to the increasingly complex construction methods and various types of building materials, it is increasingly difficult to fully meet the construction requirements. The shortcomings of traditional bonding mortar are mainly reflected in the following aspects: [0003] (1) Traditional bonding mortar is generally composed of inorganic cementitious materials, sandy aggregate, powder, additives, etc. It has a relatively high density, and its dry density is generally 1.4g / cm 3 above. The quality of the materials consumed during construction is large, and at the same time, due to the large self-weight of the materials, the load-bearing load of the building is increased. Wh...

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Problems solved by technology

[0004] (2) The setting and hardening speed of traditional bonded mortar is slow, and it takes a long time to form the required strength suitable for subsequent construction. It cannot meet the requirements for rapid subsequent construction, and it is easy to delay the construction time

[0005] (3) The elastic modulus of traditional bonded mortar is large, and the deformation ability of the base surface is insufficient, and there is a risk of cracking

[0006] (4) The ingredients of the mortar are single, the cohesive force is not enough, and the adaptability of the base material is weak;

[0007] (5) Traditional bonding mortar has a single function

For example, in response to the current building energy-saving needs, traditional bonded mortar does not have additional properties such as thermal insulation effect

[0008] (6) Traditional ready-mixed mortar needs to be mixed on site, and raw materials such as cement and sand are piled up on site, occupying the site, and the process of mixing and transporting will also cause environmental pollution in terms of dust, noise, sewage, etc. At present, many cities have explicitly banned the use of existing mortar. mix mortar

At this time, the traditional mortar needs to use a larger adhesive surface on the wall and use more materials to stick the ribs to a larger distance than the wall due to its heavy weight and weak hanging resistance, resulting in Inconvenient construction, waste of materials

At the same time, the strength of the bonding mortar is produced slowly, and it is necessary to wait for a long time for the mortar to harden before subsequent plastering construction, which affects the construction progress

In addition, the ribs are made of aluminum alloy or plastic, and the surface is smooth. Many traditional bonding mortars cannot achieve effective bonding.

Therefore, at present, there is no suitable bonding mortar for aluminum alloy or plastic punching ribs, which can be completely suitable for its bonding.

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