Alkali-resistant concrete for manufacturing jacking pipes
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A concrete and alkali-resistant technology, applied in the field of alkali-resistant concrete, can solve problems such as corrosion and cracks, and achieve high water resistance and toughness
Inactive Publication Date: 2017-08-08
成都金玉雄辉建筑工程有限公司
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Problems solved by technology
[0005] The present invention aims at the problem of cracks and corrosion in alkaline soil in existing pipe jacking made based on ordinary concrete, and provides an alkali-resistant concrete for making pipe jacking
Method used
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Embodiment 1
[0022] Choose the pipe jacking made of ordinary concrete, destroy the pipe jacking, take 500g pipe jacking block, put it into the simulated alkaline soil test solution, the pH of the alkaline soil test solution is 7.5-8, and extract it from the alkaline loess soil of the Loess Plateau. Soak it for 1 month, weigh it again, count the weight data, and mark it as A.
Embodiment 2
[0024] The pipe jacking prepared by the following ratio is selected, and the concrete is composed according to the following weight ratio: 50 parts of high-alumina white cement, 10 parts of kaolin, 40 parts of stone powder, 30 parts of machine-made sand, 2 parts of water-retaining agent, and 2 parts of silicone water-repellent agent . Destroy the pipe jacking, take 500g pipe jacking block, put it into the simulated alkaline soil test solution, the pH of the alkaline soil test solution is 7.5-8, and extract it from the alkaline loess cotton soil on the Loess Plateau, soak it for 1 month, and weigh it again. Quantity, statistical weight data, marked as B.
Embodiment 3
[0026] The pipe jacking prepared by the following ratio is selected, and the concrete is composed of the following weight ratio: 70 parts of high-alumina white cement, 15 parts of kaolin, 50 parts of stone powder, 50 parts of machine-made sand, 8 parts of water-retaining agent, and 8 parts of silicone water-repellent agent . Destroy the pipe jacking, take 500g pipe jacking block, put it into the simulated alkaline soil test solution, the pH of the alkaline soil test solution is 7.5-8, and extract it from the alkaline loess cotton soil on the Loess Plateau, soak it for 1 month, and weigh it again. Quantities, statistical weight data, marked C.
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Abstract
The invention relates to the field of manufacturing of jacking pipes and discloses alkali-resistant concrete for manufacturing jacking pipes. The technical key point is as follows: the alkali-resistant concrete is prepared from the following components in parts by weight: 50-70 parts of high-aluminum white cement, 10-15 parts of kaolin, 40-50 parts of stone powder, 30-50 parts of machine-made sand, 2-8 parts of water-retaining agents, 2-8 parts of organosilicone water repellents, 2-6 parts of polyvinyl alcohol, 10-20 parts of silicon powder, 4-8 parts of naphthalene sulfonic acid-formaldehyde condensate sodium salt, 0.2-0.8 part of hydroxypropyl methyl cellulose, 1-5 parts of tributyl phosphate, 1-2 parts of defoaming agents and 2.4-3.2 parts of polysilicone. Through the alkali-resistant concrete for manufacturing jacking pipes, the purposes of permanently resisting water, resisting moisture and resisting chemical corrosion can be achieved; the problem that the existing jacking pipes manufactured by ordinary concrete have cracks and are corroded in the alkali soil can be solved.
Description
technical field [0001] The invention relates to the field of pipe jacking manufacture, in particular to an alkali-resistant concrete used for making pipe jacking. Background technique [0002] In the existing pipeline laying, the pipe jacking construction is mostly used, and the pipe jacking construction is a non-excavation construction method, which is a pipeline burying construction technology without excavation or less excavation. Pipe jacking construction is to use the jacking force generated by the jacking equipment in the working pit to overcome the friction between the pipeline and the surrounding soil, push the pipeline into the soil according to the designed slope, and transport the earth away. After one section of pipe has been jacked into the soil layer, the second section of pipe will continue to be jacked. Its principle is to push the tool pipe or roadheader from the working pit through the soil layer to the receiving pit by means of the thrust of the main top ...
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