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Layered porous cement-based sound absorption material and preparation method thereof
The invention discloses a layered porous cement-based sound absorption material and a preparation method thereof. The layered porous cement-based sound absorption material comprises calcium alginate hydrogel balls and Portland cement. Wherein the calcium alginate hydrogel balls are prepared from sodium alginate powder and a calcium chloride or calcium lactate aqueous solution; the preparation method comprises the following steps: firstly, dropwise adding a sodium alginate hydrogel solution into plastic molds with different apertures, and then soaking the plastic molds in an aqueous solution containing a calcium ion compound to prepare calcium alginate hydrogel balls with different diameters; and uniformly mixing the two calcium alginate hydrogel balls with different diameters with Portland cement, and drying to obtain the calcium alginate hydrogel ball. The porous cement-based sound absorption material with different pore sizes and a layered structure is prepared by the inventor through a template method, the average sound absorption coefficient (NRC) of the porous cement-based sound absorption material reaches 0.5, the compressive strength reaches 1.42 MPa, and the integrated design of sound absorption and mechanical properties of the cement-based material is achieved.
本发明公开了一种分层多孔水泥基吸声材料及其制备方法，所述分层多孔水泥基吸声材料包括海藻酸钙水凝胶球和硅酸盐水泥。其中海藻酸钙水凝胶球由海藻酸钠粉末和氯化钙或乳酸钙水溶液制备而成；首先将海藻酸钠水凝胶溶液滴入不同孔径的塑料模具中，之后浸泡在含钙离子化合物的水溶液中，制备不同直径的海藻酸钙水凝胶球；再将两种不同直径的海藻酸钙水凝胶球与硅酸盐水泥混合均匀后烘干即得。本发明人通过利用模板法制备具有不同孔径大小，以及具有分层结构的多孔水泥基吸声材料，其平均吸声系数(NRC)达到了0.5，抗压强度达到了1.42MPa，达成该水泥基材料吸声与力学性能一体化设计。
Layered porous cement-based sound absorption material and preparation method thereof
The invention discloses a layered porous cement-based sound absorption material and a preparation method thereof. The layered porous cement-based sound absorption material comprises calcium alginate hydrogel balls and Portland cement. Wherein the calcium alginate hydrogel balls are prepared from sodium alginate powder and a calcium chloride or calcium lactate aqueous solution; the preparation method comprises the following steps: firstly, dropwise adding a sodium alginate hydrogel solution into plastic molds with different apertures, and then soaking the plastic molds in an aqueous solution containing a calcium ion compound to prepare calcium alginate hydrogel balls with different diameters; and uniformly mixing the two calcium alginate hydrogel balls with different diameters with Portland cement, and drying to obtain the calcium alginate hydrogel ball. The porous cement-based sound absorption material with different pore sizes and a layered structure is prepared by the inventor through a template method, the average sound absorption coefficient (NRC) of the porous cement-based sound absorption material reaches 0.5, the compressive strength reaches 1.42 MPa, and the integrated design of sound absorption and mechanical properties of the cement-based material is achieved.
本发明公开了一种分层多孔水泥基吸声材料及其制备方法，所述分层多孔水泥基吸声材料包括海藻酸钙水凝胶球和硅酸盐水泥。其中海藻酸钙水凝胶球由海藻酸钠粉末和氯化钙或乳酸钙水溶液制备而成；首先将海藻酸钠水凝胶溶液滴入不同孔径的塑料模具中，之后浸泡在含钙离子化合物的水溶液中，制备不同直径的海藻酸钙水凝胶球；再将两种不同直径的海藻酸钙水凝胶球与硅酸盐水泥混合均匀后烘干即得。本发明人通过利用模板法制备具有不同孔径大小，以及具有分层结构的多孔水泥基吸声材料，其平均吸声系数(NRC)达到了0.5，抗压强度达到了1.42MPa，达成该水泥基材料吸声与力学性能一体化设计。
Layered porous cement-based sound absorption material and preparation method thereof
一种分层多孔水泥基吸声材料及其制备方法
SHE WEI (author) / WANG JUNKAI (author)
2023-07-07
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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