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Preparation method of high-performance structural material based on carbonation

A structural material and carbonation technology, applied in the field of building materials, can solve the problems of low thermal stability and corrosion resistance of C-S-H gel, and achieve the effect of excellent mechanical properties and short curing time

Active Publication Date: 2020-06-09
山东汉博昱洲新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention aims to propose a method for preparing a carbonation-based high-performance structural material to solve the problems of low thermal stability and corrosion resistance of the existing cement hydration reaction to generate C-S-H gel

Method used

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  • Preparation method of high-performance structural material based on carbonation
  • Preparation method of high-performance structural material based on carbonation
  • Preparation method of high-performance structural material based on carbonation

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Embodiment 1

[0028] A method for preparing a high-performance structural material based on carbonation, specifically comprising the following steps:

[0029] 1) Clinker firing: crushing, mixing and grinding calcareous raw materials (limestone) and siliceous raw materials (sandstone) to obtain a raw meal with a calcium-silicon ratio of 1.80; calcining the raw meal in a rotary kiln (the calcining temperature is 1350°C), cooling by a grate cooler (cooling rate is 350°C / min), and then grinding to obtain a Burger specific surface area of ​​345m 2 / kg of ground clinker;

[0030] 2) Forming of green body: According to the mass percentage, mix 70% finely ground clinker, 25% quartz sand, and 5% water reducer, add tap water and stir evenly, then pour the size of 50×50×100cm 3 pouring and molding in a mold, and pre-cured for 24 hours at 40°C and 100% humidity, and then demolded and carried out infrared drying to obtain a pouring molding green body with a moisture content of 15%, wherein the amount o...

Embodiment 2

[0038] A method for preparing a high-performance structural material based on carbonation, specifically comprising the following steps:

[0039] 1) Clinker firing: crushing, mixing and grinding calcareous raw materials (limestone) and siliceous raw materials (sandstone) to obtain a raw meal with a calcium-silicon ratio of 1.93; calcining the raw meal in a rotary kiln (calcination temperature is 1350°C), cooling by a grate cooler (cooling rate is 150°C / min), and then grinding to obtain a Burger specific surface area of ​​365m 2 / kg of ground clinker;

[0040] 2) Forming of green body: According to the mass percentage, after mixing 50% finely ground clinker and 50% quartz sand, add tap water and stir evenly, then pour the 3 In the mold, and under the molding pressure of 30MPa for 3min, the mixture is pressed and molded to obtain a pressed molded body, wherein the amount of water added is 15% of the mass of the ground clinker, and the quartz sand is composed of an average partic...

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Abstract

The invention provides a preparation method of a high-performance structural material based on carbonation. According to the preparation method, a calcareous raw material and a siliceous raw materialare fired into a clinker having main minerals including tricalcium silicate, beta-dicalcium silicate and the like which have hydration activity, or gamma-dicalcium silicate, tricalcium disilicate, monocalcium silicate and the like without anhydrous activity, or any combination of the minerals; the clinker is mixed with fine aggregate / and an additive; the mixture is molded at a low water-solid ratio and subjected to carbonation maintenance, and calcium carbonate and silica gel with relatively high mechanical properties are formed in the curing process; compared with C-S-H gel in a cement-basedmaterial, the prepared high-performance structural material has more excellent mechanical properties, thermal stability, corrosion resistance and volume stability, can have shorter maintenance time, and is suitable for engineering construction such as building exterior walls, ocean facilities and rapid repair.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a method for preparing a carbonation-based high-performance structural material. Background technique [0002] Concrete is a porous, multi-phase, multi-scale complex structural material formed by hydration products such as C-S-H gel formed by the hydration reaction of cement and sand and gravel aggregates. It has high compressive strength and adaptability to production materials and processes. It is the most widely used building material in the world today. [0003] Limestone (Limestone) is a key raw material for cement production and an important aggregate for concrete. It has the characteristics of high strength, high stability and high durability. If a building material with a product composition and structure similar to limestone can be prepared, it can significantly improve Its mechanical properties and durability promote the extension of infrastructure construct...

Claims

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Application Information

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IPC IPC(8): C04B28/24C04B40/02
CPCC04B28/24C04B40/0236C04B2201/50C04B14/28C04B14/06C04B2103/302
Inventor 王发洲刘志超穆元冬何永佳赵思雪
Owner 山东汉博昱洲新材料有限公司
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