Composite demolding process for UHPC (Ultra High Performance Concrete) fair-faced veneer

Abstract

The invention relates to the field of buildings, in particular to a composite demolding process for a UHPC (Ultra High Performance Concrete) fair-faced veneer, which is characterized in that a stearate layer is formed on the surface of a conventional demolding agent layer before UHPC slurry is poured. The method can overcome the phenomenon that the UHPC component is easy to stick to the mold during demolding, and can ensure that the surface of the UHPC component is not adhered with dirt such as a release agent and rust. Compared with a traditional method, a stearate layer is additionally arranged, and the stearate layer is used for isolating UHPC from the release agent, so that the demolding effect is guaranteed. Due to the existence of the stearate layer, the demolding efficiency of the demolding agent is improved, the mold sticking phenomenon of UHPC is effectively eliminated, the mold damage and deterioration speed is greatly reduced, and meanwhile, the requirement for the mold surface cleanliness is greatly reduced. After the UHPC is demoulded, the surface clear water veneer can be realized without spraying, polishing and other treatments.

Description

technical field [0001] The invention relates to the field of construction, in particular to a composite demoulding process for UHPC clear water finish. Background technique [0002] UHPC (Ultra High Performance Concrete) is a self-compacting material that combines ultra-high strength, ultra-high toughness and high durability, and can be molded by pouring. Due to the ultra-high performance of UHPC, architectural designers can implement integrated design of structural decoration, The UHPC material is formed in one step, and the demoulding comes with a clear water decoration effect, which not only reduces the structural weight, but also greatly reduces the construction process and saves construction costs. In order for UHPC components to achieve clear water decoration effects, not only the formulation optimization of the UHPC material itself is required, but also a good molding mold and demoulding process are required. A mold with a good surface condition and a stable structur...

AI Technical Summary

Problems solved by technology

The existing release agents are all organic materials, which are different from UHPC itself in terms of material and texture. When the release agent adheres to the UHPC surface during demoulding, the surface color will shift. The color tone is uneven, and the release agent film itself will also absorb dust, bacteria and other dirt, resulting in dirt on the UHPC surface

If the negative impact of the release agent on the surface appearance of UHPC is reduced by using a thin brush of the release agent, the release effect of the release agent will be greatly reduced due to the high adhesion of UHPC itself, and the mold sticking phenomenon is extremely prone to occur , not only lead to the scrapping of UHPC components, but also lead to accelerated deterioration of the surface of the test mold, and the number of cycles can be reduced, thus greatly increasing the production cost

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