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Anti-seepage and anti-crack dry-mixed mortar

A technology for dry-mixing mortar and mixture, applied in the field of mortar composition, can solve the problems of high cost, difficult repair, short effective trial period, etc., and achieve the effects of low price, simple construction and small dry shrinkage rate

Active Publication Date: 2011-09-21
SICHUAN HUASHI GREEN HOMELAND BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Flexible waterproof materials mainly use polymer substances to form a hydrophobic elastic protective layer on the concrete surface by means of polymerization and modification to seal the concrete surface and prevent the passage of water, but its effective trial period is short and its durability is limited. Only 20 years, and the cost is high, repair is more difficult

Method used

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  • Anti-seepage and anti-crack dry-mixed mortar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] An anti-seepage and anti-cracking dry-mixed mortar mainly includes (see Table 1 for details): 80% cement, 11.7% barium ore (industrial barium sulfate, or precipitated barium sulfate), 5% wet-process sericite powder, 1.6% Components and mass percentages of waterproof mortar admixture, 1% iron oxide red, 0-0.347% fiber, 0.85% admixture (including 0.7% water reducer, 0.05% cellulose ether and 0.1% defoamer) Each component; put the weighed material into the mixer and mix evenly, and then the anti-seepage and anti-crack dry-mixed mortar is obtained.

[0032]Among them: Jiahua Cement Plant P·LH42.5R low-heat portland cement is used for cement, PCA(Ⅰ) polycarboxylate water reducing agent of Jiangsu Bote New Material Co., Ltd. is used for water reducer, and Kayton Group is used for waterproof mortar admixture For the KMA waterproof mortar admixture (K309) produced by the company, the cellulose ether adopts hydroxypropyl methylcellulose ether HPMC75000S from Longfor Technology C...

Embodiment 2

[0042] An anti-seepage and anti-cracking dry-mixed mortar, the cementing material of the blank sample is Lafarge P.O42.5R ordinary Portland cement, the waterproof material is replaced by 70-140 mesh quartz sand, and the other ingredients are the same as Table 1, according to the standard JGJ / T 70-2009 "Standard for Test Methods of Basic Properties of Building Mortar" to measure the influence of low-heat Portland cement, waterproof material and fiber on the impermeability of mortar. The results are shown in Table 4.

[0043] Table 4: Mortar penetration test results:

[0044]

[0045] It can be seen from Table 4 that compared with the blank sample JX0', the use of low-heat Portland cement, adding waterproof materials, and polyvinyl alcohol fiber mortar has better impermeability. It meets the requirements of anti-seepage pressure in the building materials industry standard JC / T 984-2005 (7d >1MPa, 28d<1.5MPa).

Embodiment 3

[0047] An anti-seepage and anti-cracking dry-mixed mortar, the blank sample precipitated barium sulfate is replaced by 70-140 mesh quartz sand, other components are the same as in Table 1, and low-background multi-channel energy gamma spectrometer 40 K, 232 Th, 226 Ra specific activity was measured to study the effect of precipitated barium sulfate on the radioactive shielding effect of mortar, and the results are shown in Table 5.

[0048] Table 5: Radiation shielding effect test:

[0049] Numbering

[0050] It can be seen from Table 5 that compared with the blank sample JX0, after adding precipitated barium sulfate, the shielding rate of mortar to gamma rays has been improved to a certain extent. When the amount of precipitated barium sulfate is 11.7wt%, the shielding rate is increased by 13.49% . This is mainly because barite contains a large amount of heavy element barium. When gamma rays pass through the substance, three main effects can occur in the interac...

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Abstract

The invention discloses anti-seepage and anti-crack dry-mixed mortar which is characterized by comprising the following components in percentage by weight: 20-90% of cement, 2-40% of barium ore, 1-30% of wet sericite powder, 0.05-5% of waterproofing mortar additive, 0-5% of iron oxide red and 0.01-5% of fiber, wherein the barium ore is one of or a mixture of more than two of witherite, industrialbarium carbonate, barite or industrial barium sulfate. In the mortar, the barium ore is used as an element material and has a strong capability of obstructing absorption of ray, the fiber is capable of effectively improving the toughness, ductibility, abrasive resistance, stripping resistance, impact resistance, fatigue resistance, anti-seepage and anti-crack property and freezing and thawing resistance, and the waterproofing material is capable of effectively improving the seepage resistance and the like of concrete. The anti-seepage and anti-crack dry-mixed mortar which is provided by the invention can be widely applied to civil buildings, has the advantages of low cost, wide raw material sources and good anti-seepage and anti-crack property and is easy to construct.

Description

technical field [0001] The invention belongs to a mortar composition, and relates to an anti-seepage and anti-crack dry-mixed mortar. The mortar of the invention is suitable for use as a building material, and is mainly used for mortar in masonry floors, walls or roof panels, and has good anti-seepage and anti-cracking properties. cracking effect. Background technique [0002] With the continuous development of the construction industry, the quality requirements of the project are getting higher and higher, and the impermeability and crack resistance is a very important and urgent problem to be solved. The use of waterproof mortar is the most important measure, and the addition of admixtures is the most basic means to improve the anti-seepage ability of the mortar. Adding a certain amount of fiber and waterproofing agent into the mortar can meet the increasing requirements for impermeability and crack resistance, which can also significantly improve the durability of the mo...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B14/20C04B14/26C04B14/36C04B14/4668C04B16/0633C04B16/0641C04B16/0691C04B20/0096C04B24/383C04B2103/302C04B2103/50C04B2103/54C04B2103/65C04B14/308
Inventor 霍冀川刘煦邓跃全董发勤雷永林雷洪
Owner SICHUAN HUASHI GREEN HOMELAND BUILDING MATERIALS
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