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Road water stabilizing layer material and preparation method thereof

A water-stabilizing layer and road technology, applied in the field of road water-stabilizing layer materials and its preparation, can solve problems such as the difficulty of uniform dispersion, and achieve an obvious effect of promoting

Active Publication Date: 2022-03-04
武汉圣清之源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Chinese patent application number 201510287161.8 discloses a phosphogypsum hydraulic road base, road base material and its preparation method. The phosphogypsum hydraulic curing agent used uses a large amount of elastic styrene-acrylic emulsion. Difficult to disperse evenly in saline and high alkali environment
and easily degradable

Method used

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  • Road water stabilizing layer material and preparation method thereof
  • Road water stabilizing layer material and preparation method thereof
  • Road water stabilizing layer material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 Weigh 85 kg of phosphogypsum (containing 16% of free water), add 2.0 kg of quicklime (70% of calcium oxide), mix well and let stand for 24 hours. Add 10 kg of 42.5 Portland cement and activator (activator ratio, weight ratio: 55% of large particle size silica sol (90nm), 8% of silicon nitride, 3.5% of sulfonated melamine water reducer, K-30 dispersion 3% agent, 30.5% water) 3 kg was released after stirring for 10 minutes with a mixing mixer. Then prepare samples and maintain according to the regulations.

[0032] The 3-day unconfined compressive strength is 2.3MPa, the 7-day unconfined compressive strength is 3.5MPa, the 14-day 8.6MPa, and the 28-day 10.2MPa.

Embodiment 2

[0033] Example 2 Weigh 85 kg of phosphogypsum (free water 16%), add 2.0 kg of quicklime, mix evenly and let stand for 24 hours. Add 10 kg of 42.5 Portland cement and activator (ratio of activator, weight ratio: nano-silica sol E31 (D50 13nm, solid content 50% market purchase) 60%, silicon nitride 8%, sulfonated melamine water reducer 3.5%, K-30 dispersant 3%, water 25.5%) 3 kg with a mixing mixer for 10 minutes before release. Then prepare samples and maintain according to the regulations.

[0034] The 3-day unconfined compressive strength was 1.4MPa, the 7-day unconfined compressive strength was 2.6MPa, the 14-day unconfined compressive strength was 5.8MPa, and the 28-day unconfined compressive strength was 7.1MPa.

Embodiment 3

[0035]Example 3 Weigh 85 kg of phosphogypsum (free water 16%), add 2.0 kg of quicklime, mix evenly and let stand for 24 hours. Add 10 kg of 42.5 Portland cement and 3 kg of activator (proportion of activator: large particle size silica sol (90nm) 55%, silicon nitride 8%, sulfonated melamine water reducer 3.5%, water 33.5%). Stir with a mixing mixer for 10 minutes and release. Then prepare samples and maintain according to the regulations.

[0036] The 3-day unconfined compressive strength is 1.2MPa, the 7-day unconfined compressive strength is 2.1MPa, the 14-day 4.9MPa, and the 28-day 6.8MPa.

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Abstract

The invention relates to a road water-stable layer material. The road water-stable layer material is prepared by the following steps: (1) mixing 79-90% of phosphogypsum and 2-6% of lime according to a weight ratio, and aging for 24 hours; then adding 6-10% of Portland cement, and uniformly mixing to obtain a mixture; and (2) adding 2-5% of ardealite hydraulicity exciting agent into the mixture, and uniformly mixing to obtain the road water-stable layer material. The phosphogypsum-based road water-stable layer material disclosed by the invention is used for replacing a traditional road water-stable layer material and is constructed according to a standard road construction method, and a formed road water-stable layer reaches technical parameters of a high-grade road.

Description

technical field [0001] The invention relates to a road water stabilization layer material and a preparation method thereof. Background technique [0002] Phosphogypsum is a by-product of phosphorus chemical industry. A large amount of phosphogypsum stacked in the open air not only costs a lot of money to dispose of, but also constitutes a source of pollution and a safety risk. [0003] The physical and mechanical properties of phosphogypsum are similar to that of soil, and it is a good road construction material after modification. Phosphogypsum is stable in water and has densification and expansion properties, so it can expand in the road base, which can compensate for most of the material shrinkage caused by temperature and humidity differences, and effectively prevent cracking. [0004] Fly ash crushed stones or large-sized stones are mostly used for traditional road water stabilization layers, that is, lime fly ash is mixed with crushed stones as a gel material, and the...

Claims

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Application Information

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IPC IPC(8): C04B28/14
CPCC04B28/143C04B2201/50C04B2111/0075C04B7/02C04B22/064C04B14/062C04B14/328C04B24/16C04B24/2688Y02W30/91
Inventor 王冠英胡振明王一木
Owner 武汉圣清之源科技有限公司
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