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

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...