Lightweight building block and preparation method

A building block, lightweight technology, applied in the field of building materials to achieve the effects of low cost, convenient construction, environmental protection and simple cost

Inactive Publication Date: 2018-11-20
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of using the free calcium oxide of steel slag as an exciter to excite metakaolin has not been reported in the literature.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Follow the steps below to prepare metakaolin-steel slag composite cementitious material lightweight building blocks:

[0018] (1) Preparation of raw materials: prepare raw materials according to the following weight percentages.

[0019] Metakaolin 20%, steel slag 10%, water 20%, ceramsite 50%.

[0020] (2) Slurry preparation and pouring into the mold: first mix and soak the steel slag with water for 2 hours, then add other materials into the mixed slurry and stir evenly, then pour into the mold.

[0021] (3) Initial curing and molding: send the blocks poured in step (2), together with the mold, into a constant temperature and humidity oven for curing: humidity 95%, temperature 70°C, curing time 4h.

[0022] (4) Demoulding and secondary curing: After step (3), the molded block is removed from the mould, and then sent to the curing room for secondary curing: temperature 20℃, humidity 98%, curing time is 7 days.

[0023] The final prepared metakaolin-steel slag composite cementitiou...

Embodiment 2

[0025] Follow the steps below to prepare metakaolin-steel slag composite cementitious material lightweight building blocks:

[0026] (1) Preparation of raw materials: prepare raw materials according to the following weight percentages.

[0027] Metakaolin 35%, steel slag 15%, water 35%, ceramsite 13%, activator (sodium hydroxide) 2%.

[0028] (2) Slurry preparation and pouring into the mold: first mix and soak the steel slag with water for 3 hours, then add other materials into the mixed slurry and stir evenly before pouring into the mold.

[0029] (3) Initial curing and molding: send the blocks poured in step (2), together with the mold, into a constant temperature and humidity oven for curing: humidity 95%, temperature 70°C, curing time 4h.

[0030] (4) Demoulding and secondary curing: After step (3), the molded block is removed from the mould, and then sent to the curing room for secondary curing: temperature 20℃, humidity 98%, curing time is 7 days.

[0031] The final prepared metaka...

Embodiment 3

[0033] Follow the steps below to prepare metakaolin-steel slag composite cementitious material lightweight building blocks:

[0034] (1) Preparation of raw materials: prepare raw materials according to the following weight percentages.

[0035] 30% metakaolin, 15% steel slag, 30% water, 25% ceramsite

[0036] (2) Slurry preparation and pouring into the mold: first mix and soak the steel slag with water for 3 hours, then add other materials into the mixed slurry and stir evenly before pouring into the mold.

[0037] (3) Initial curing and molding: send the blocks poured in step (2), together with the mold, into a constant temperature and humidity oven for curing: humidity 95%, temperature 70°C, curing time 4h.

[0038] (4) Demoulding and secondary curing: After step (3), the molded block is removed from the mould, and then sent to the curing room for secondary curing: temperature 20℃, humidity 98%, curing time is 7 days.

[0039] The final prepared metakaolin-steel slag composite cementit...

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Abstract

The invention relates to a lightweight building block which comprises raw materials in percentage by weight: 20% to 35% of metakaolin, 10% to 15% of steel slags, 20% to 35% of water, 13% to 50% of lightweight aggregates and 0% to 2% of exciting agent. A preparation method of the lightweight building block comprises the steps of: (1) carrying out raw material configuration; (2) placing the raw materials into a die to carry out shaping; (3) carrying out primary maintenance and molding; and (4) carrying out demolding and secondary maintenance. The method disclosed by the invention uses the metakaolin and the steel slags as the raw materials to produce the novel unfired building block, and is simple in preparation process; the building block is high in strength, has thermal insulation, is waterproof, can be nailed and sawed, has the characteristics of a certain earthquake resistance capacity, low cost, environmental protection, low carbon and the like, and is a novel wall material convenient to construct.

Description

Technical field [0001] The invention relates to a lightweight building block and a preparation method, in particular to a metakaolin-steel slag composite cementitious material lightweight building block and a preparation method, belonging to the field of building materials. Background technique [0002] Lightweight block is a new, high-strength, environmentally-friendly wall material. It can be used for non-load-bearing wall masonry, which can effectively reduce the weight of the wall and improve the wall's thermal insulation and sound insulation functions. At present, cement-based lightweight blocks are widely used in public buildings, shopping malls, schools, high-rise buildings, and large-span building systems. [0003] However, the current mainstream of lightweight blocks is made of foamed concrete as the main cementing material, mixed with lightweight aggregates, and metakaolin used as cementing materials to prepare lightweight blocks has not been reported in the literature. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/08C04B28/08C04B28/00C04B40/02
CPCC04B28/006C04B28/082C04B40/0254C04B2111/40C04B2201/20C04B2201/50C04B18/027C04B38/0067
Inventor 吴磊赵志曼全思臣李丹张毅赵彬宇
Owner KUNMING UNIV OF SCI & TECH
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