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Soluble glass as desulfurization abandon material volume stability improver and construction method for road

A water glass and waste material technology, which is applied in the fields of civil engineering and transportation engineering, can solve problems such as uneven settlement, cracking, and uplift of the road surface, and achieve the effects of simple and convenient construction, saving water resources, and low cost

Inactive Publication Date: 2010-10-27
HOHAI UNIV
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AI Technical Summary

Problems solved by technology

Effectively solve the problem of pavement damage such as pavement heaving, cracking and uneven settlement caused by post-construction expansion and local cracking of such semi-rigid mixtures

Method used

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Embodiment

[0008] Taking water glass (liquid sodium silicate) to improve the fly ash stable layer as an example, the mass ratio of lime and desulfurization waste in the fly ash stable layer is 25:75, and the improvement steps are as follows: (1) Measure the desulfurization rate by barium sulfate gravimetric method The content of sulfate in the waste material is 47.08%; (2) the dry mass of the semi-rigid mixture (made up of lime and desulfurization waste material) to be improved is 10000g, which is 10% by mass percentage, and the weighing modulus is 2.6-2.9 1000g of water glass, that is, the molar ratio of silicon oxide and sodium oxide in the water glass solution is 2.6-2.9; The molar ratio of silicon and sodium oxide is 2.2-2.5; or it is 15% by mass percentage, and 1500 g of water glass with a modulus of 3.1-3.4 is weighed, that is, the molar ratio of silicon oxide and sodium oxide in the water glass solution is 3.1-3.4 (3) After mixing the weighed water glass and the semi-rigid mixture...

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Abstract

The invention relates to water glass used as wasted desulfuration material cubage stability modifying agent and a construction method for road use. The invention is characterized in that the water glass is added into a mixture of a lime fly ash stabilized base or a lime fly ash gravel layer to improve the cubage stability of the lime fly ash stabilized base or the lime fly ash gravel layer. The invention has advantages that the water glass not only carries out the chemical reaction with dilatant of wasted desulfuration material to generate gel, but also has certain cementation towards lime which is not cured completely, and the water glass has certain inhibiting effect towards the cubage expansion caused by that the lime which is not cured completely is digested, cured and expanded duringlater period. The construction method uses the gelling property and the air hardening theory of the water glass and uses the porous characteristic of semi-rigid road surface base course mixture, and the construction method has simple and convenient construction, does not require traditional moisturizing and curing and saves water resource and a lot of construction processes during the curing period of the semi-rigid road surface base course.

Description

technical field [0001] The invention relates to a volume stability improver for improving desulfurization solid waste (desulfurization gypsum and high-sulfur fly ash or desulfurization fly ash) as a semi-rigid pavement base material and a road construction method thereof, belonging to civil engineering and transportation engineering technology. Background technique [0002] At present, in the pavement structure layer of expressways and high-grade highways, the fly ash stable layer (composed of lime and fly ash) and the fly ash crushed stone layer (composed of lime, fly ash and fly ash) composed of semi-rigid mixtures are widely used. gravel) as the pavement structural layer. Industrial waste such as fly ash is a commonly used material for semi-rigid pavement bases. The available industrial waste includes: fly ash, cinder, blast furnace slag, steel slag (which has been disintegrated and stabilized), and other metallurgical slag, coal gangue, etc. Among them, fly ash, the so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C7/10G01N3/00C04B28/26C04B18/04C04B14/28
CPCY02W30/91
Inventor 华明杰王保田汪莹鹤张文慧
Owner HOHAI UNIV
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