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Permeability and salt corrosion resistant cement and concrete and preparation method thereof

A concrete and salt corrosion technology, applied in the field of impermeability and salt corrosion resistance cement, concrete and its preparation, can solve the problems of high maintenance cost and high engineering cost, and achieve the goal of reducing construction cost and maintenance cost, low cost, and alleviating the difficulty of construction technology. Effect

Active Publication Date: 2014-01-08
长沙紫宸科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have led to high engineering costs and high maintenance costs to varying degrees.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Cement for experiment: A cement factory produces 32.5 grade cement, which is mainly used for civil housing construction and farmland water conservancy construction. The cement admixture is slag, fly ash, limestone 1:1:1, and the average amount of admixture is 48 %, finished cement fineness 80um sieve ≤ 3%.

[0018] Experimental bentonite: block granular sodium bentonite, with an average montmorillonite content of 86%.

[0019] The active silicon dioxide is silica, and the water reducer is a naphthalene-based water reducer, both of which are commercially available common products.

[0020] In this example, the anti-permeability and anti-salt erosion component bentonite, the conditioning agent silica, and the naphthalene-based water reducer are in a mass ratio of bentonite 100: silica 15: water reducer 0.8.

[0021] The preparation of the anti-permeability and anti-salt corrosion cement of this embodiment: add the anti-permeability and anti-salt corrosion component equiv...

Embodiment 2

[0030] Raw materials for experiment:

[0031] Cement: A dry-process rotary kiln manufacturer, whose production process is to grind clinker and admixture into clinker powder and slag powder respectively, and then blend them into 42.5 grade ordinary cement for supplying tunnel projects. The ratio of blending and blending is slag powder Powder 30%, clinker powder 70%. The admixture material of grinding slag powder is slag and cinder, and it is made by grinding with 5% gypsum ingredients. The cost of slag powder is 176 yuan / t.

[0032] Modified nano-based bentonite powder: commercially available, with an average montmorillonite content of 90.5%, and the factory price of bentonite powder is 185 yuan / t.

[0033] Chimney dust "silica fume" and melamine powder superplasticizer are commercially available.

[0034] The ratio of the anti-permeability and anti-salt erosion component bentonite and conditioner in this embodiment is: the weight ratio of bentonite powder: silica fume: water...

Embodiment 3

[0044] Raw materials for experiment:

[0045] Cement, a cement factory, produces low-aluminum dam clinker, and the product is 42.5 grade special cement, which is mainly used for coastal embankment engineering and manufacturing anti-wave cone piers. The cement admixture is slag and fly ash at a ratio of 1:1 The average total dosage is 30%, and the finished cement fineness 80um sieve ≤ 5%.

[0046] Bentonite, commercially available, with 91% montmorillonite content, the factory price of dry bentonite is 56 yuan / t, which is cheaper than the comprehensive average price of 98 yuan / t for blended materials; diatomite concentrate and naphthalene-based water reducer are commercially available product.

[0047] In this example, the anti-permeability and anti-salt corrosion components have a ratio of bentonite and conditioner: the ratio of selected bentonite to conditioner diatomite and naphthalene-based water reducer is bentonite 100: diatomite 28: water reducer 1.5.

[0048] Preparat...

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PUM

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Abstract

The invention discloses permeability and salt corrosion resistant cement and concrete and a preparation method thereof. The permeability and salt corrosion resistant cement and concrete contains a permeability and salt corrosion resistant component, namely, bentonite and a bentonite texturizer, wherein the texturizer is a mixture of silicon dioxide powder and a water reducing agent; a mass ratio of the bentonite to active silicon dioxide powder to the water reducing agent is 100:(3-30):(0.3-3.5), and the total content of the salt corrosion resistant component, namely, bentonite and the bentonite texturizer is 5%-20% of the total weight of the cement. The invention further discloses a preparation method of the permeability and salt corrosion resistant cement and concrete. The permeability and salt corrosion resistant cement and the concrete disclosed by the invention have good permeability and salt corrosion resistant effect, and are low in cost, good in economical efficiency, and beneficial to lowering permeability and salt corrosion resistant engineering cost and improving engineering quality.

Description

technical field [0001] The invention relates to an anti-seepage and anti-salt corrosion cement, concrete and a preparation method thereof. Background technique [0002] Cement is the most widely used hydraulic cementitious material. It is the cementing material of concrete. After hardening, it leaves a large number of capillary channels and dry shrinkage and thermal expansion micro-cracks. These micro-channels and cracks provide protection for leakage and salt corrosion. The path creates conditions that lead to leakage and salt corrosion damage of cement or concrete products or concrete works, especially in dams, tunnels, culverts, canals, pools, towers, dikes, wharves and other projects. become the biggest engineering technical problem. [0003] The current technical methods to solve the leakage and salt corrosion problems of cement and concrete projects can be summarized into four categories: one is to set up one or more anti-seepage isolation layers; the other is to add ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B111/27C04B111/20
Inventor 尹无忌
Owner 长沙紫宸科技开发有限公司
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