Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-strength lightweight gypsum prefabricated slab and preparation method thereof
The invention discloses a high-strength lightweight gypsum prefabricated slab and a preparation method thereof. The method comprises the following steps: S1, preparing the following raw materials in parts by weight: 20-60 parts of alpha-hemihydrate phosphogypsum, 10-55 parts of aggregate, 5-15 parts of superfine composite powder, 2-8 parts of lime, 0.2-1.5 parts of a foaming agent, 0.3-2.0 parts of a polycarboxylic acid water reducer, 0.1-1.5 parts of hydroxyethyl modified starch ether, 0.02-0.3 part of a retarder and 20-33 parts of water; s2, sequentially adding a foaming agent, a polycarboxylic acid water reducer, hydroxyethyl modified starch ether and a retarder into water, and uniformly stirring to prepare a mixed solution; s3, carrying out dry mixing on the alpha-semi-hydrated phosphogypsum, the superfine composite powder, the aggregate and the lime; s4, adding the material prepared in the step S3 into the mixed solution, and carrying out wet mixing; and S5, carrying out semi-dry pressing molding to obtain the high-strength light gypsum prefabricated slab. The method has the characteristics of high solid waste utilization rate, simple preparation process and low cost, and the prepared gypsum board has the advantages of low density, low shrinkage, high strength, high water resistance and the like, and is suitable for being popularized and applied as a prefabricated wallboard.
一种高强轻质石膏预制板及其制备方法，方法包括：S1.按如下重量份制备原料：α‑半水磷石膏20～60份，骨料10～55份，超细复合粉5～15份，石灰2～8份，发泡剂0.2～1.5份，聚羧酸系减水剂为0.3～2.0份，羟乙基改性淀粉醚0.1～1.5份，缓凝剂0.02～0.3份和水20～33份；S2.将发泡剂、聚羧酸系减水剂、羟乙基改性淀粉醚和缓凝剂依次加入水中搅拌均匀，制得混合液；S3.将α‑半水磷石膏、超细复合粉、骨料、石灰进行干混；S4.将在步骤S3制得的物料加入混合液中并湿混；S5.半干压成型，制得高强轻质石膏预制板。本方法具有固废利用率高、制备工艺简单和成本低廉的特点，且制备的石膏板具有低密度、低收缩、高强度和高耐水等优点，适合作为预制墙板进行推广应用。
High-strength lightweight gypsum prefabricated slab and preparation method thereof
The invention discloses a high-strength lightweight gypsum prefabricated slab and a preparation method thereof. The method comprises the following steps: S1, preparing the following raw materials in parts by weight: 20-60 parts of alpha-hemihydrate phosphogypsum, 10-55 parts of aggregate, 5-15 parts of superfine composite powder, 2-8 parts of lime, 0.2-1.5 parts of a foaming agent, 0.3-2.0 parts of a polycarboxylic acid water reducer, 0.1-1.5 parts of hydroxyethyl modified starch ether, 0.02-0.3 part of a retarder and 20-33 parts of water; s2, sequentially adding a foaming agent, a polycarboxylic acid water reducer, hydroxyethyl modified starch ether and a retarder into water, and uniformly stirring to prepare a mixed solution; s3, carrying out dry mixing on the alpha-semi-hydrated phosphogypsum, the superfine composite powder, the aggregate and the lime; s4, adding the material prepared in the step S3 into the mixed solution, and carrying out wet mixing; and S5, carrying out semi-dry pressing molding to obtain the high-strength light gypsum prefabricated slab. The method has the characteristics of high solid waste utilization rate, simple preparation process and low cost, and the prepared gypsum board has the advantages of low density, low shrinkage, high strength, high water resistance and the like, and is suitable for being popularized and applied as a prefabricated wallboard.
一种高强轻质石膏预制板及其制备方法，方法包括：S1.按如下重量份制备原料：α‑半水磷石膏20～60份，骨料10～55份，超细复合粉5～15份，石灰2～8份，发泡剂0.2～1.5份，聚羧酸系减水剂为0.3～2.0份，羟乙基改性淀粉醚0.1～1.5份，缓凝剂0.02～0.3份和水20～33份；S2.将发泡剂、聚羧酸系减水剂、羟乙基改性淀粉醚和缓凝剂依次加入水中搅拌均匀，制得混合液；S3.将α‑半水磷石膏、超细复合粉、骨料、石灰进行干混；S4.将在步骤S3制得的物料加入混合液中并湿混；S5.半干压成型，制得高强轻质石膏预制板。本方法具有固废利用率高、制备工艺简单和成本低廉的特点，且制备的石膏板具有低密度、低收缩、高强度和高耐水等优点，适合作为预制墙板进行推广应用。
High-strength lightweight gypsum prefabricated slab and preparation method thereof
一种高强轻质石膏预制板及其制备方法
DUAN PENGXUAN (Autor:in) / LI YING (Autor:in) / HU CHENG (Autor:in) / CHEN PING (Autor:in) / XIANG WEIHENG (Autor:in)
01.08.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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