Light transmitting cement layer, photovoltaic building material and preparation method thereof

Abstract

The invention belongs to the technical field of photovoltaic building integration and relates to a light transmitting cement layer, a photovoltaic building material and a preparation method thereof. Raw materials of the light transmitting cement layer comprise cement mortar and light transmitting resin, and the surface area of the light transmitting resin accounts for 10%-15% of the surface area of the light transmitting cement layer, wherein the cement mortar comprises, by mass, 25-50 parts of cement, 40-65 parts of natural sand, 10-20 parts of glass powder, 5-7 parts of glass fiber, 3-6 parts of metakaolin, 2-3 parts of titanium dioxide, 1-1.5 parts of aluminum oxide, 1-1.5 parts of calcium carbonate, 0.8-1.5 parts of zinc oxide, 1-2 parts of defoaming agent, 2-5 parts of leveling agent,30-55 parts of water and 4-10 parts of inorganic mineral pigment. The light transmitting cement layer prepared through the method has the high compactness and corrosion resistance. Thus, the light transmitting cement layer can isolate a material protected by the light transmitting cement layer from an external corrosive material. The hardness of the light transmitting cement layer exceeds 4H andreaches up to the hardness required by conventional building materials.

Description

technical field [0001] The invention relates to the technical field of photovoltaic building integration, in particular to a light-transmitting cement layer, a photovoltaic building material and a preparation method thereof. Background technique [0002] With the development of science and technology and the improvement of people's living standards, people put forward higher and higher requirements for the performance of building materials. At present, the colors of conventional photovoltaic modules are generally dark blue, gray, and black. The color is single and unsightly, and it is difficult to be highly integrated with buildings, which limits the application of photovoltaic modules in buildings to a certain extent. Based on this, the patent CN200420085961 uses optical anti-reflection films of different thicknesses and types to make crystalline silicon solar cells present different colors; the patent CN201220200568 achieves the same color as the building by changing the c...

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Problems solved by technology

Combining solar cell modules with cement-based materials can give cement materials the function of generating electricity, but it should be considered that the appearance of cement is generally gray, the transmittance of photons is low, and the efficiency of the prepared photovoltaic modules will also be reduced.

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