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Straw cement-based microporous building material and preparation method thereof

A building material, cement-based technology, applied in the field of building materials, can solve the problems of high thermal conductivity, high volume density of formed boards, low thermal conductivity of manufacturing volume density, etc., and achieve the effect of broad application prospects and small and uniform pores

Active Publication Date: 2013-07-24
CHINA BUILDING MATERIALS ACAD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the above two invention patents, "straw" and "cement" are involved, but "microporous building materials" are not involved, resulting in a large volume density and high thermal conductivity of the formed board, which is not suitable for manufacturing low volume density and heat conduction materials. Building material products with low coefficient, proper mechanical strength and good thermal performance

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  • Straw cement-based microporous building material and preparation method thereof

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preparation example Construction

[0035] The preparation method of the straw cement-based microporous building material provided by the present invention may comprise the following steps:

[0036] 1) Prepare the polymer aqueous solution, and measure the remaining water according to the proportioning ratio;

[0037] 2) Mix 90-100% of cement, fly ash, sand, coagulation-accelerating materials and the remaining water and stir evenly;

[0038] 3) Add straw while stirring, so that it is evenly dispersed in the above-mentioned mixture;

[0039] 4) Stir continuously, gradually add the polymer aqueous solution, and then add the remaining water to form a mixture containing uniform micro-bubbles, which is the straw cement-based microporous building material.

[0040] Using the above-mentioned straw cement-based microporous building materials can directly manufacture building material products, including the following steps:

[0041] Step 1: pour the above-mentioned mixture into the model, and cover and cure; the coveri...

Embodiment 1

[0046] The solid material mix ratio of straw cement-based microporous building materials (by weight, the unit of "part" can be "gram" or "kilogram"): 2.3 parts of wheat straw powder, 44.5 parts of cement, 21.6 parts of fly ash, sand 21.6 parts, 10 parts of coagulation-accelerating materials (gypsum and rapid-hardening sulfoaluminate cement each account for 50%); the poly-solid ratio is 0.2%, and the water-solid ratio is 36%.

[0047] Preparation of straw cement-based microporous building materials and test blocks, the specific method includes the following steps:

[0048] 1) Take by weighing 23 grams of wheat straw powder, 445 grams of ordinary Portland cement with a strength grade of 42.5, 216 grams of fly ash, 216 grams of sand, 50 grams of gypsum, and 50 grams of quick-hardening sulfoaluminate cement;

[0049] 2) Measure 40 milliliters of polyvinyl alcohol resin polymer solution with a solid content of 5% (excluding the volume of the solid polymer, the water content is calc...

Embodiment 2

[0058] The solid material mix ratio of straw cement-based microporous building materials: 4.3 parts of wheat straw crushed powder, 55.2 parts of cement, 17.0 parts of fly ash, 21.5 parts of sand, 2.0 parts of coagulation-accelerating material; poly-solid ratio 0.4%, water-solid ratio 38 %.

[0059] Preparation of straw cement-based microporous building materials and test blocks, the specific method includes the following steps:

[0060] 1) Take by weighing 43 grams of wheat straw powder, 552 grams of rapid-hardening sulfoaluminate cement with a strength grade of 42.5, 170 grams of fly ash, 215 grams of sand, and 20 grams of sodium sulfate;

[0061] 2) Measure 80 milliliters of acrylic resin polymer solution with a solid content of 5% (excluding the volume of the solid polymer, the water content is calculated as 80 milliliters), and another 300 milliliters of water;

[0062] 3) Put 552 grams of fast-hardening sulfoaluminate cement with a strength grade of 42.5, 170 grams of fl...

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Abstract

The invention discloses a straw cement-based microporous building material and a preparation method thereof. The building material comprises the following components in parts by weight proportioning: 2-5 parts of straw flour, 40-60 parts of cement, 15-25 parts of coal ash, 10-25 parts of sand, 2-15 parts of coagulator material, polymers and water, wherein the polymer-solid ratio is 0.2-0.5% and water-solid ratio is 35-45%. The preparation method comprises the following steps: 1), stirring and uniformly mixing the cement, the coal ash, the sand, the coagulator material and 90-100% of water; 2), adding the straw flour while stirring and uniformly dispersing in the above mixed material; 3), continuously stirring the mixture and gradually adding polymer solution with a solid content of 5% or 10% to form the mixed material comprising uniform small air bubbles; 4), pouring the mixed material into a mould and covering and curing the material; 5), de-molding and putting the material in the atmospheric environment for natural curing to obtain a straw cement-based microporous building material product. The invention can play a big role in the building field and has a broad application prospect.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a cement-based microporous building material containing crop straws and a preparation method thereof. Background technique [0002] Crop straw is an inexhaustible natural resource, and the resource utilization of crop straw meets the social needs of sustainable development. There have been reports on the mixing (or compounding) of straw and cement. In the invention patent ZL200510114895.2 "Wheat straw cement composite wallboard and its manufacturing method", it is introduced that the wheat straw cement composite material is made of cement, sand, fly ash , crushed wheat straw to form a solid material, and then mixed with polymer and water to form a pourable mixture, and then formed into a plate. In the invention patent 200710054841.0 "Manufacturing Method of Straw Cement Mixed Wood-Based Panel", it is introduced to use broken straw, modified acrylic fiber, quartz san...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/36C04B28/04C04B18/24
CPCY02W30/91
Inventor 崔玉忠
Owner CHINA BUILDING MATERIALS ACAD
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