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Preparation method for high-performance cement

A high-performance cement technology, applied in the field of high-performance cement preparation, can solve the problem of low durability

Pending Publication Date: 2015-09-23
阮炯正 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The present invention can solve the problem of low durability of ordinary Portland cement at present, and especially can provide a preparation method of high-performance cement at low cost

Method used

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  • Preparation method for high-performance cement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1 Contrast test of impervious concrete:

[0037] C30P6 pumping impervious concrete foundation (blank) mix ratio: general-purpose Portland Portland PO42.5 strength grade cement, cement dosage 325kg, medium sand 835kg, crushed stone 5-31.5mm particle size 1010kg, water 170kg, naphthalene water reducing Dosage 9kg. In 28 days, the actual test impermeability level reached the P8 requirement.

[0038] C30P6 pumping impervious concrete test proportion: P.O42.5*b high-performance cement 325kg, sand 835kg, gravel 5-31.5mm particle size 1010kg, water 170kg, naphthalene-based water reducing agent 9kg. In 28 days, the actual impermeability grade reaches the requirements of P14.

[0039] C30P6 pumping impervious concrete test proportion: P.O42.5*1 high-performance cement 325kg, sand 835kg, gravel 5-31.5mm particle size 1010kg, water 170kg, naphthalene-based water reducing agent 9kg. In 28 days, the actual impermeability level reaches the requirements of P18.

Embodiment 2

[0040] Embodiment 2 Freeze-resistant concrete comparative test:

[0041] C30F100 pumping antifreeze concrete foundation (blank) mix ratio: general-purpose Portland Portland PO42.5 strength grade cement, cement dosage is 325kg, medium sand is 835kg, crushed stone particle size is (5mm~31.5mm) 1010kg, water 160kg, naphthalene It is 9.5kg of water reducer. A 100×100×100mm cubic concrete specimen was made, and after 28 days of standard curing, the actual test of the concrete specimen’s resistance to freezing and thawing was up to 100 times qualified.

[0042] C30F100 pumping antifreeze concrete test mix ratio: P.O42.5*b high-performance cement, cement dosage 325kg, sand 835kg, crushed stone particle size (5mm~31.5mm) 1010kg, water 160kg, naphthalene-based water reducing agent 9.5kg . After 28 days of standard curing, the actual detection of concrete resistance to freezing and thawing reaches 150 times. qualified

[0043] C30F100 pumping antifreeze concrete test mix ratio: P.O4...

Embodiment 3

[0044] Embodiment 3 anti-carbonation concrete:

[0045] C20 concrete benchmark (blank) ratio: PC32.5 general-purpose Portland cement, cement alkali content 1.2%, cement dosage 302kg, gravel (5-31.5mm) 1238kg, sand 625kg water 175kg, naphthalene-based water reducer 9.1 kg. After 28 days, the average carbonization depth was actually detected by the standard carbonization box carbonization experiment to be 9.3mm.

[0046] C20 concrete test ratio: P.C32.5*b high-performance cement, cement dosage 302kg, sand 625kg, gravel (5-31.5mm) 1238kg, water 175kg, naphthalene-based water reducing agent 9.1kg. After 28 days, the average carbonization depth was actually detected by the standard carbonization box carbonization experiment to be 5.4mm.

[0047] C20 concrete test ratio: P.O32.5*1 high-performance cement, cement dosage 302kg, sand 625kg, gravel (5-31.5mm) 1238kg, water 175kg, naphthalene-based water reducing agent 9.1kg. After 28 days, the average carbonization depth was actually...

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Abstract

The invention relates to a preparation method for high-performance cement. Magniferous carbonate rocks such as dolomite and magnesite, portland cement clinker, gypsum, cement mixtures, alkali-activators and the like are levigated according to a certain proportion to particle sizes of general purpose portland cement, namely the high-performance cement is prepared, and compared with the general purpose portland cement, the high-performance cement has the advantages that higher anti-permeability, freezing resistance and anti-carbonization is achieved, and good volume stability is achieved. According to the cement, the manufacturing technique is simple, all durability indexes of a cement product are improved, the cost is low, and therefore the wide popularization and application market is obtained.

Description

Technical field: [0001] The invention relates to a preparation method of high-performance cement, in particular to a preparation method of high-performance cement mixed with magnesium-containing carbonate rock. Background technique: [0002] Many cement concretes are damaged by wind, sun, rain, and various media in air, water, and soil all year round. Therefore, in addition to requiring concrete and cement products to have sufficient strength, they should also have the ability to resist the impact of the external environment. The ability to damage, that is, good impermeability, frost resistance, carbonization resistance, and good volume stability. [0003] Alkali-carbonate reaction is also one of the reasons that affect the safety of concrete engineering. For more than half a century, many water conservancy projects, railways, highways, bridges, tunnels, and industrial and civil buildings have been destroyed. Alkali-aggregate reaction Also known as the "cancer" of concrete,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/02C04B7/36
Inventor 阮炯正于万增阮蓬
Owner 阮炯正
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