CN101838129A - Premixed dry mortar - Google Patents

Premixed dry mortar Download PDF

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Publication number
CN101838129A
CN101838129A CN201010160356A CN201010160356A CN101838129A CN 101838129 A CN101838129 A CN 101838129A CN 201010160356 A CN201010160356 A CN 201010160356A CN 201010160356 A CN201010160356 A CN 201010160356A CN 101838129 A CN101838129 A CN 101838129A
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Prior art keywords
dry
mix
water glass
sand
used sand
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CN201010160356A
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CN101838129B (en
Inventor
肖雪军
鞠宇飞
刘文斌
徐开胜
张小鹏
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CHANGZHOU ZHONGHUA BUILDING MATERIAL TECHNOLOGY Co Ltd
Changzhou Vocational Institute of Engineering
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CHANGZHOU ZHONGHUA BUILDING MATERIAL TECHNOLOGY Co Ltd
Changzhou Vocational Institute of Engineering
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Abstract

The invention relates to a building material technology, in particular to a concrete premix. A premixed dry mortar is prepared by mainly mixing the components of 12-25 percent of cement, 3-4 percent of pulverized fuel ash, 32-50 percent of yellow sand, 2.7-3.4 percent of mortar thickening powder and 0-0.05 percent of additive. The premixed dry mortar is characterized in that sodium silicate casting used sand is added in the main components. The invention solves the problem of larger consumption of the yellow sand in the traditional premixed dry mortar.

Description

Dry-mix
Technical field
The present invention relates to building material technology, relate in particular to a kind of concrete Preblend.
Background technology
Cast used sand can be divided into three kinds of wet type old sand, resin bonded sand and used sodium silicate sands.But with regard to regenerating used, be difficult relatively.The depleted old sand is an alkalescence, and part is toppled over by institute, and not even a blade of grass grows, adds China's high grade quartz sand resource relative shortage, if the old sand comprehensive utilization is not discarded in a large number, is exactly the significant wastage to limited resources, and causes serious environmental to pollute.China is world's foundry industry first big country, China in 2008 foundry goods annual production reaches more than 3,000 ten thousand tons, accounts for 40% of worldwide production, and the 1 year depleted old sand amount in the whole nation is more than 3,000 ten thousand tons, major part is by uncontrollable discharge, and wherein the quantity discharged of water glass cast used sand is also more than 1,000,000 tons.The dehydration high-modulus sodium silicate water glass, yellow soda ash and the sodium bicarbonate that contain in the water glass cast used sand can cause disadvantageous effect to the workability and the mechanical property of dry-mix, so the water glass cast used sand is not always as the raw materials for production of dry-mix.
Dry-mix is meant that fine aggregate and inorganic binder, water-keeping thickening material, mineral admixture and additive that the drying screening is handled carry out a kind of particulate state or the powdery that physical mixed forms by a certain percentage, be transported to the building site with form packed or in bulk, the material that can directly use after adding water and mixing and stirring.Stir mortar with conventional on-site and compare, dry-mix has following advantage: (1) excellent quality; (2) wide in variety; (3) workability is good; (4) easy to use; (5) environmental protection; (6) economy.Wherein the used fine aggregate of dry-mix mainly is natural yellow ground, and yellow ground is the maximum starting material of consumption in the dry-mix.Present yellow ground is Nonrenewable resources, and through market survey, ceiling price once increased to 100 yuan/ton in recent years, and the trend of this rise in price also clearly.Country will inevitably limit the exploitation of natural yellow ground to the protection of natural river course, makes the resource of yellow ground more and more nervous, will inevitably bring restriction to the development of dry-mix.
Summary of the invention
In order to overcome above-mentioned defective, the technical problem to be solved in the present invention is: at the bigger problem of yellow ground usage quantity in the existing dry-mix, provide a kind of yellow ground usage quantity little dry-mix.
In order to overcome the defective that exists in the background technology, the technical solution adopted for the present invention to solve the technical problems is: a kind of dry-mix, main constituent is that cement, flyash, yellow ground, mortar densification powder and admixture are mixed with and form, add the water glass cast used sand in main constituent, the quality of constituent is composed as follows:
Cement: 12～25%
Flyash: 3～4%
Yellow ground: 32～50%
Water glass cast used sand: 32～50%
Mortar densification powder: 2.7～3.4%
Admixture: 0～0.002%
Admixture described in the present invention is water reducer, air entrapment agent or redispersable latex powder or above-described more than one mixture.
Described water reducer accounts for 0.1 of dry-mix quality～0.3 ‰ described in the present invention; Described air entrapment agent accounts for 0.06 of dry-mix quality～0.09 ‰; Described redispersable latex powder accounts for 0.1 of dry-mix quality～1 ‰, above-mentioned used water reducer is a calcium lignin sulphonate, air entrapment agent is a Sodium dodecylbenzene sulfonate, redispersable latex powder is the EVA rubber powder of Wa Ke company, wherein calcium lignin sulphonate has delayed coagulation concurrently, above-mentioned used mortar densification powder is the HZ-P highly effective water-keeping densification powder that Changzhou great positive building materials company limited is sold, and has good water-keeping thickening effect, can significantly improve the workability of dry-mix.
Employed cement is 32.5 or 42.5 ordinary Portland cements among the present invention, and the flyash that is adopted is II level ash, and it has better economic when satisfying the technical feature requirement; Selected yellow ground is a natural river sand among the present invention, and its silt content is 0.9%, and fineness modulus is 2.3, and apparent density is 2640kg/m 3
Its composition of water glass cast used sand described in the present invention has SiO 2, dehydration high-modulus sodium silicate water glass, yellow soda ash and sodium bicarbonate, also have a spot of ferric oxide simultaneously, wherein SiO 2Content is more than 90%, and fineness modulus is 1.9, is mainly quartz sand, and silt content is 4.0%, and fineness modulus is 1.9, and apparent density is 2610kg/m 3Wherein " mud " in the water glass cast used sand is different from " mud " in the natural yellow ground, mainly is tiny silica powder, can be used as the flour filler in the dry-mix, and is less to the properties of dry-mixed mortar influence.Experimental study shows that under the same intensity grade, the water glass cast used sand less than 60% o'clock, does not have negative interaction to dry-mix workability and mechanical property for sand coarse aggregate ratio.This external water glass cast used sand and yellow ground can be by changing the dry-mix that cement-sand ratio prepares different intensity grades under the situation of mixing.
Beneficial effect: under the prerequisite that guarantees identical properties of dry-mixed mortar, utilize water glass cast used sand instead of part yellow ground, can solve the stacking problem of old sand like this, can reduce the cost of dry-mix again as gathering materials the preparation dry-mix.The destruction that simultaneously can avoid the water glass cast used sand that environment is caused.
Embodiment
The present invention is described further by following example.
Example 1～6 takes by weighing different material according to the quality mixture ratio in the table 1 and mixes, and the water of adding 17～22% stirs.Testing used cement is 32.5 ordinary Portland cements, and the yellow ground fineness modulus is 2.3, and water glass cast used sand fineness modulus is 1.9, and flyash is II level ash.
By table 1 test-results as can be seen, along with the increase of water glass cast used sand volume, dry-mix intensity is on a declining curve.The water glass cast used sand for sand coarse aggregate ratio below 60%, very little to the influence of intensity, also very little to the mortar working Effect on Performance.
Example 7～12 takes by weighing different material according to the quality mixture ratio in the table 2 and mixes, and the water of adding 16～22% stirs.Testing used cement is 42.5 ordinary Portland cements, and the yellow ground fineness modulus is 2.3, and water glass cast used sand fineness modulus is 1.9, and flyash is II level ash.
By example 7～10 data as can be known, water glass cast used sand and yellow ground to the situation of mixing under, can prepare the dry powder motar of four strength grades commonly used by adjusting water cement ratio, be respectively DPM5.0, DPM7.5, DPM10 and DPM15.By the quality mixture ratio that example 7～10 is embodied, can suitably reduce slurry consistency by adjusting water requirement, can prepare the dry-mixed masonry mortar of four strength grades such as DMM5.0, DMM7.5, DMM10 and DMM15 of corresponding label.
Example 11,12 shows, water glass cast used sand and yellow ground to the situation of mixing under, can prepare the dry powder ground mortar of DSM15 and two labels commonly used of DSM20, test-results shows workability and good mechanical properties.
Under the table 1 same intensity grade, the cast used sand volume is to the influence of dry-mix serviceability
Figure GSA00000098243000051
Table 2 yellow ground, water glass cast used sand be under the situation of mixing, the preparation of different intensity grades dry-mix
Sequence number Example 7 Example 8 Example 9 Example 10 Example 11 Example 12
Strength grade ??DPM5.0 ??DPM7.5 ??DPM10 ??DPM15 ??DSM15 ??DSM20
Sequence number Example 7 Example 8 Example 9 Example 10 Example 11 Example 12
42.5 cement/Kg ??196.3 ??226.3 ??256.3 ??286.3 ??271.5 ??351.9
Flyash/Kg ??50.2 ??50.2 ??50.2 ??50.2 ??66.6 ??66.6
Densification powder/Kg ??50.2 ??40.2 ??40.2 ??40.2 ??54 ??54
Air entrapment agent/Kg ??0.0251 ??0.0201 ??0.0201 ??0.0201 ??0.027 ??0.027
Wood calcium/Kg ??0.1506 ??0.1206 ??0.1206 ??0.1206 ??0.162 ??0.162
Yellow ground/Kg ??736.6 ??586.6 ??571.6 ??556.6 ??704.1 ??663.9
Water glass cast used sand/Kg ??736.6 ??586.6 ??571.6 ??556.6 ??704.1 ??663.9
Denseness/mm ??109 ??86 ??106 ??100 ??41 ??60
28d intensity/MPa ??6.6 ??11.6 ??13.7 ??15.8 ??17.99 ??20.48

Claims (4)

1. dry-mix, main constituent are that cement, flyash, yellow ground, mortar densification powder and admixture are mixed with and form, and it is characterized in that: add the water glass cast used sand in main constituent, the quality of constituent is composed as follows:
Cement: 12～25%
Flyash: 3～4%
Yellow ground: 32～50%
Water glass cast used sand: 32～50%
Mortar densification powder: 2.7～3.4%
Admixture: 0～0.05%
2. dry-mix as claimed in claim 1 is characterized in that: described admixture is water reducer, air entrapment agent or redispersable latex powder or above-described more than one mixture.
3. dry-mix as claimed in claim 2 is characterized in that: described water reducer account for water glass cast used sand preparation the dry-mix quality 0.1～0.3 ‰; Described air entrapment agent accounts for 0.06 of dry-mix quality～0.09 ‰; Described redispersable latex powder accounts for 0.1 of dry-mix quality～1 ‰.
4. dry-mix as claimed in claim 1 is characterized in that: described its composition of water glass cast used sand has SiO 2, sodium silicate water glass, yellow soda ash and sodium bicarbonate, contain ferric oxide simultaneously, wherein SiO 2Content is more than 90%, and fineness modulus is 1.9.
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102701681A (en) * 2012-06-28 2012-10-03 秦大春 Waste foundry sand dry-mixed mortar
CN102701674A (en) * 2012-05-28 2012-10-03 江西中科新建材有限公司 Dry-mixed mortar for ground
CN102701673A (en) * 2012-05-28 2012-10-03 江西中科新建材有限公司 Masonry dry-mixed mortar
CN105198482A (en) * 2015-09-16 2015-12-30 诸暨市兆山天峰干混砂浆有限公司 Masonry mortar special for aerated building blocks
CN105837141A (en) * 2016-04-26 2016-08-10 安徽坤隆新型建材有限公司 Acid-resistant dry-mixed mortar
CN105837140A (en) * 2016-04-26 2016-08-10 安徽坤隆新型建材有限公司 Brick making mortar
CN107056178A (en) * 2016-10-12 2017-08-18 上海漕源新型建材有限公司 A kind of environmentally friendly dry powder and mortar
CN109650817A (en) * 2019-01-21 2019-04-19 淳安泰源建材有限公司 A kind of masonry mortar and its preparation process
CN110128067A (en) * 2019-06-03 2019-08-16 厦门兑泰实业有限公司 Method for producing anti-crack mortar by using black casting sand
CN110183131A (en) * 2019-06-03 2019-08-30 厦门兑泰实业有限公司 Method for producing plastering mortar and tile adhesive auxiliary agent by using black casting sand
CN110642563A (en) * 2019-10-28 2020-01-03 宁波新广亿建材有限公司 Dry powder mortar for pavement and preparation process thereof
CN112780336A (en) * 2019-01-18 2021-05-11 湖北宜化江家墩矿业有限公司 Pressure leaching type filling mining process

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101376579A (en) * 2008-10-09 2009-03-04 江苏省建筑工程集团有限公司 Limestone powder dry powder mortar

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101376579A (en) * 2008-10-09 2009-03-04 江苏省建筑工程集团有限公司 Limestone powder dry powder mortar

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102701674A (en) * 2012-05-28 2012-10-03 江西中科新建材有限公司 Dry-mixed mortar for ground
CN102701673A (en) * 2012-05-28 2012-10-03 江西中科新建材有限公司 Masonry dry-mixed mortar
CN102701681A (en) * 2012-06-28 2012-10-03 秦大春 Waste foundry sand dry-mixed mortar
CN105198482A (en) * 2015-09-16 2015-12-30 诸暨市兆山天峰干混砂浆有限公司 Masonry mortar special for aerated building blocks
CN105198482B (en) * 2015-09-16 2019-01-11 诸暨市兆山天峰干混砂浆有限公司 Aerated-block special masonry mortar
CN105837141A (en) * 2016-04-26 2016-08-10 安徽坤隆新型建材有限公司 Acid-resistant dry-mixed mortar
CN105837140A (en) * 2016-04-26 2016-08-10 安徽坤隆新型建材有限公司 Brick making mortar
CN107056178A (en) * 2016-10-12 2017-08-18 上海漕源新型建材有限公司 A kind of environmentally friendly dry powder and mortar
CN112780336A (en) * 2019-01-18 2021-05-11 湖北宜化江家墩矿业有限公司 Pressure leaching type filling mining process
CN112780336B (en) * 2019-01-18 2023-03-31 湖北宜化江家墩矿业有限公司 Pressure leaching type filling mining process
CN109650817A (en) * 2019-01-21 2019-04-19 淳安泰源建材有限公司 A kind of masonry mortar and its preparation process
CN110128067A (en) * 2019-06-03 2019-08-16 厦门兑泰实业有限公司 Method for producing anti-crack mortar by using black casting sand
CN110183131A (en) * 2019-06-03 2019-08-30 厦门兑泰实业有限公司 Method for producing plastering mortar and tile adhesive auxiliary agent by using black casting sand
CN110183131B (en) * 2019-06-03 2021-07-13 厦门兑泰实业有限公司 Method for producing plastering mortar and tile adhesive auxiliary agent by using black casting sand
CN110128067B (en) * 2019-06-03 2021-07-23 厦门兑泰环保科技有限公司 Method for producing anti-crack mortar by using black casting sand
CN110642563A (en) * 2019-10-28 2020-01-03 宁波新广亿建材有限公司 Dry powder mortar for pavement and preparation process thereof

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