A kind of gypsum-based sandless mold machine-sprayed lightweight plastering material and preparation method thereof

Abstract

The invention belongs to the technical field of building materials, and particularly relates to a gypsum-based sand-free spraying light-weight plastering material and a preparation method thereof. Byresearching a retarder of the gypsum-based sand-free spraying light-weight plastering material, a mixed retarder is adopted, while the delayed coagulation is achieved, the gypsum is slightly damaged,after the gypsum-based sand-free spraying light-weight plastering material is used for 7 days, the breaking strength reaches 2.5 to 3.0 MPa, and the compressive strength reaches 5.5 to 6.0MPa. The porosity is 37.5 to 38.7 percent, an average pore diameter is 1600 to 1835nm, and various requirements of GB / T28627-2012 on the gypsum-based sand-free spraying light-weight plastering material can be met.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a gypsum-based sandless lightweight plastering material and a preparation method thereof. Background technique [0002] In interior wall construction, traditional cement mortar and mixed mortar have poor water retention and large shrinkage during hydration and drying, which can easily lead to hollowing and cracking of the wall, which is more likely to occur when the construction is not standardized. The on-site repair rate is high, which is a defect that cement-based mortar itself cannot overcome. At the same time, cement, a product with high energy consumption and high emission, is one of the important factors causing the haze weather conditions. Therefore, it is imperative to develop a modern green building materials industry that is environmentally friendly and energy-saving. [0003] Plastering gypsum mortar is a plastering material used for building ...

AI Technical Summary

Problems solved by technology

[0010] Due to the characteristics of gypsum, it is easy to cause quality problems such as hollowing, cracking, and falling off after construction. In addition, repeated long-term repairs cannot be repeated during the construction process, so as to avoid poor surface perception caused by turning over the skin, resulting in uneven wall quality after plastering

However, when the existing technology solves the problem of using gypsum for machine-spraying construction, it does not solve the problem that gypsum machine-spraying reduces the strength of gypsum, or the construction conditions are strict, and it is necessary to clean up the dust, dirt, oil stains, etc. on the surface of the base. After repairing defects such as reserved holes, control the humidity of the wall, control the construction water to be clean, or avoid vibration, collision, freezing, and sun exposure during the later period of condensation and hardening, so as to ensure that the light gypsum plastering slurry forms sufficient strength and increases construction difficulty

[0011] Based on the above analysis, this application intends to invent a light-weight plastering machine spraying gypsum material, which can simultaneously solve the problem of gypsum retardation, increase the strength of gypsum to meet the needs of special construction conditions, and reduce the requirements for construction walls during machine spraying. And the requirements for water quality, solve quality problems such as hollowing, cracking, and falling off after construction, and reduce the conditions for later maintenance

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