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A kind of modified mixed Portland cement and preparation method thereof

A Portland cement and modification technology, applied in cement production and other directions, can solve problems affecting project quality, energy, resource waste, isolation, etc., and achieve the effects of facilitating construction, reducing water consumption, and improving fluidity

Active Publication Date: 2020-01-31
程菲 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since it is difficult for the concrete mixing plant to adjust the admixture, the type and the amount of the admixture in time according to the quality of the cement and its changes, it is difficult to fundamentally solve the compatibility problem between the cement and the admixture
In addition to the problems in the current system, such as cement and concrete have always belonged to two industries, there is a serious isolation phenomenon, the contradictions and problems between the two industries are becoming more and more prominent, which is also the reason that affects the quality of the project and leads to the waste of energy and resources

Method used

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  • A kind of modified mixed Portland cement and preparation method thereof
  • A kind of modified mixed Portland cement and preparation method thereof
  • A kind of modified mixed Portland cement and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A 42.5 modified mixed portland cement, the raw material ratio of each component is: clinker 78.5%, gypsum 6.0%, limestone 5.0%, granulated blast furnace slag 7.48%, activator 0.02% and mineral colorant (coal Gangue) 3.0%. The activator uses 2,5-dihydroxyethylpiperazine mother liquor, and the component materials meet the relevant standards and the aforementioned requirements.

[0046] The preparation method of the 42.5 modified mixed Portland cement, the specific steps are as follows:

[0047] Step 1: Select the above-mentioned raw materials, adopt the pre-homogenization measures of flat laying and vertical cutting and use in combination, and store them in clinker warehouse, gypsum warehouse, and multiple warehouses of different types of mixed materials. The activator is stored in a storage tank for standby;

[0048] Step 2: adopt mixed grinding method A, after measuring the ingredients of clinker, gypsum, limestone, granulated blast furnace slag, activator, and coal ga...

Embodiment 2

[0051] A 32.5 modified mixed portland cement, the raw material ratio of each component is: clinker 55.0%, gypsum 5.0%, limestone 10.0%, granulated blast furnace slag 5.48%, fly ash 10.5%, pozzolanic mixed material 9.0% %, coal gangue (mineral coloring agent) 3.0%, activator 0.02% and composite water reducer 2.0%. The activator uses 2,5-dihydroxyethylpiperazine mother liquor, the composite water reducer uses polycarboxylate powder, and the component raw materials meet the relevant standards and the aforementioned requirements.

[0052] The preparation method of the 32.5 modified mixed Portland cement, the specific steps are as follows:

[0053] Step 1: Select the above-mentioned raw materials, take the measures of flat laying, vertical cutting and pre-homogenization, and put them into the clinker warehouse, gypsum warehouse, and multiple warehouses of different types of mixed materials, and store the modified components and activators separately in storage tanks ,spare;

[00...

Embodiment 3

[0058] A 32.5 modified mixed portland cement, the raw material ratio of each component is: clinker 55.0%, gypsum 5.0%, limestone 10.0%, granulated blast furnace slag 5.5%, fly ash 9.3%, slag (pozzolanic Mixed material) 8.0%, carbon black (mineral colorant) 3.0%, activator 0.10%, cellulose ether 0.1% and redispersible latex powder 4.0%. The activator used is composed of 2,5-dihydroxyethylpiperazine mother liquor and tetrahydroxyethylethylenediamine, the cellulose ether uses hydroxypropyl methylcellulose ether, and the redispersible latex powder uses ethylene- Vinyl acetate copolymer. The component raw materials meet the relevant standards and the aforementioned requirements.

[0059] The preparation method of the 32.5 modified mixed Portland cement, the specific steps are as follows:

[0060] Step 1: Select the above-mentioned raw materials, take the measures of flat laying, vertical cutting and pre-homogenization, and put them into the clinker warehouse, gypsum warehouse, an...

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Abstract

The invention discloses modified mixed silicate cement and a preparation method thereof and relates to the field of cement and concrete production technologies and comprehensive utilization of solid wastes. Besides Portland cement clinker, gypsum, limestone and an activating agent, the composition of the cement also comprises one or more of granulated blast furnace slag, fly ash, a pozzolanic mixed material and the like, and the cement also includes other waste residues and modified components. The modified mixed silicate cement aims to solve the problems that since there are too many limits to existing production process conditions and existing cement temperature is high, it is difficult to add an admixture for concrete in cement production. According to the modified mixed silicate cement, a combined cooling device is adopted, the temperature of the cement can be controlled to be not higher than 60 DEG C, and the structure and effect of the modified components are prevented from beingdamaged; a secondary batching system, a uniformizing system and an automatic control system are added and optimized to satisfy the technical conditions for preparation of different varieties, products with modified components and the like. The modified mixed silicate cement can improve the uniformity, workability, durability, color and other properties of concrete and mortar, simplify construction operation and have a broad application prospect.

Description

technical field [0001] The invention relates to the fields of cement and concrete production technology and solid waste comprehensive utilization, in particular to a modified mixed Portland cement and a preparation method thereof. Background technique [0002] Cement can only be used as a cementitious material to prepare concrete and mortar with sand and gravel and admixtures. Modern concrete is characterized by the widespread use of high-efficiency admixtures and large-volume admixtures. Its application and development are the most prominent achievements or symbols of technological progress in the cement concrete industry in the past 30 years. In the "2050 World Cement Industry Development Technology Roadmap" drawn up by the International Energy Agency (IEA) and the Cement Industry Sustainable Development Promotion Committee (CSI), it is proposed that the most important direction of cement development is to produce Ordinary Portland Cement (OPC ) turned to the production o...

Claims

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Application Information

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IPC IPC(8): C04B7/21
CPCY02P40/10
Inventor 程菲冷发光丁美荣周永祥黄忠卫宋笑王立新王祖琦王紫娴黄维瑶
Owner 程菲
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