Solid waste-based super-retarded cement as well as preparation method and application thereof

An ultra-retarding and cement technology, applied in the field of cement materials, can solve the problems of not being able to meet the time requirements of three-layer continuous paving and long-distance transportation of mixtures, and achieve the goals of improving market competitiveness, delaying setting time, and increasing SO3 content Effect

Pending Publication Date: 2022-03-01
山东高速工程检测有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the initial setting time of existing retarded cement for roads is generally about 5-5.5 hours, and the final setting time is generally about 6-7.5 hours. Time requirements for three-layer continuous paving and long-distance transportation of mixed materials

Method used

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  • Solid waste-based super-retarded cement as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of solid waste-based super-retarded cement for road base and its preparation method, comprising the following steps:

[0029] 1. According to the quality, take 64 parts of limestone, 18 parts of sugar residue, 2 parts of non-ferrous metal ash, 4 parts of dried sludge, 2 parts of polluted soil, 10 parts of red shale and other raw materials, which are crushed, pre-homogenized, and mixed in proportion Then enter the raw meal mill for grinding to obtain cement raw meal. The raw materials are sent to the shaft kiln and rotary kiln for calcining respectively to obtain molten materials, which are cooled by a grate cooler to obtain two kinds of cement clinker, which are then configured and homogenized according to the mass ratio of 1:1 to obtain usable cement clinker. material. After the road base is further cooled with solid waste-based ultra-retarding cement clinker, 60 parts of clinker, 14 parts of fly ash, 10 parts of slag powder, 2 parts of dihydrate gypsum, 4 part...

Embodiment 2

[0032] A kind of solid waste base ultra-retarded cement for road base and preparation method thereof, comprises the following steps:

[0033] According to the quality, 67 parts of limestone, 14 parts of sugar residue, 4 parts of non-ferrous metal ash, 2 parts of dried sludge, 4 parts of polluted soil, 9 parts of red shale and other raw materials are crushed, pre-homogenized, and mixed in proportion before entering The cement raw meal is obtained by grinding in the raw meal mill. The raw materials are sent to the shaft kiln and rotary kiln for calcining respectively to obtain molten materials, which are cooled by a grate cooler to obtain two kinds of cement clinker, which are then configured and homogenized according to the mass ratio of 1:1 to obtain usable cement clinker. material. The road base layer is piled with solid waste-based ultra-retarded cement clinker, and after further cooling, 68 parts of clinker, 10 parts of fly ash, 8 parts of slag powder, 3 parts of dihydrate...

Embodiment 3

[0036] A kind of solid waste base ultra-retarded cement for road base and preparation method thereof, comprises the following steps:

[0037]According to the quality, 64 parts of limestone, 16 parts of sugar residue, 3 parts of non-ferrous metal ash, 3 parts of dried sludge, 4 parts of polluted soil, 10 parts of red shale and other raw materials are crushed, pre-homogenized, and mixed in proportion before entering The cement raw meal is obtained by grinding in the raw meal mill. The raw materials are sent to the shaft kiln and rotary kiln for calcining respectively to obtain molten materials, which are cooled by a grate cooler to obtain two kinds of cement clinker, which are then configured and homogenized according to the mass ratio of 1:1 to obtain usable cement clinker. material. The road base layer is piled with solid waste-based ultra-retarded cement clinker, and after further cooling, 64 parts of clinker, 12 parts of fly ash, 9 parts of slag powder, 2 parts of dihydrate...

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Abstract

The invention belongs to the technical field of cement materials, and particularly relates to solid-waste-based super-retarded cement as well as a preparation method and application thereof. The cement comprises the following components in parts by weight: 60-68 parts of clinker, 10-14 parts of fly ash, 8-10 parts of slag powder, 2-4 parts of dihydrate gypsum, 3-4 parts of phosphogypsum, 2-4 parts of desulfurized gypsum and 4-8 parts of superfine slag powder. A certain mass ratio of sugar residue is added in the production of the clinker to improve the SO3 content of the cement clinker, the characteristics of different solid waste materials are deeply combined, industrial waste residues such as non-ferrous metal slag, sludge residue and polluted soil are cooperatively used, a large amount of solid waste materials are consumed, and the characteristics of different materials are cooperated to prepare the cement clinker with the characteristics of obviously prolonged retarding time and high stability. The solid waste-based super-retarded cement for the road base is low in production cost, simple in process and applicable to a three-layer continuous paving process of a water-stable base. The strength of the obtained cement is high, the strength grade of 42. 5 cement for the road base is met, the initial setting time is longer than 440 min, and the final setting time is longer than 590 min.

Description

technical field [0001] The invention belongs to the technical field of cement materials, and in particular relates to a solid waste-based super retarded cement and a preparation method and application thereof. Background technique [0002] With the rapid development of modern highway construction and the continuous optimization of pavement structure, the base layer generally adopts the structural mode of three layers of water-stabilized layer (54cm) + flexible base layer (10cm). The important role played by the water-stabilized layer is self-evident. Construction efficiency and quality are related to the construction efficiency and quality of the entire project. The construction process of expressway water stabilization layer usually includes multiple processes such as mixing materials, paving, compacting, etc., and sufficient construction time is required to ensure the construction quality of the road base. There is a strict time requirement in the last procedure of "rolli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/26C04B7/21C04B7/24C04B7/36C04B7/44C04B7/47
CPCC04B7/26C04B7/21C04B7/24C04B7/36C04B7/44C04B7/47Y02P40/10
Inventor 王鑫洋高宾高国华汲平李立平李培海阚涛苏纪壮王凯王业飞
Owner 山东高速工程检测有限公司
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