CN108164197B - A kind of high-strength composite cement aeolian accumulation mortar - Google Patents
A kind of high-strength composite cement aeolian accumulation mortar Download PDFInfo
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- CN108164197B CN108164197B CN201810160836.6A CN201810160836A CN108164197B CN 108164197 B CN108164197 B CN 108164197B CN 201810160836 A CN201810160836 A CN 201810160836A CN 108164197 B CN108164197 B CN 108164197B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
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Abstract
The present invention relates to desert drift-sand more particularly to a kind of modified high-strength complex cement aeolian accumulation mortar products.Modified high performance complex cement aeolian accumulation mortar provided by the invention includes following components in parts by weight: 100 parts of drift-sand, 40-55 parts of cementitious material, 16-27.5 parts of water, 6-14 parts of water-reducing agent, 0.5-2 parts of water-retaining agent, 0.5-6 parts of air entraining agent, wherein, water-cement ratio 0.4-0.5.High-strength composite cement aeolian accumulation mortar provided by the invention, all using Alxa area drift-sand as aggregate, using Inner Mongol Meng Xi cement and local fly ash abundant as cementitious material, using novel additive as modifying agent, plaster workability is excellent, durable, freeze thawing resistance is impervious, shrinkage is good, cement consumption is few, at low cost, is able to satisfy construction demand completely.
Description
Technical field
The present invention relates to desert drift-sand more particularly to a kind of modified high-strength complex cement aeolian accumulation mortar products.
Background technique
China is in the civil engineering infrastructure Large scale construction stage, and cement-base concrete is because of its superior performance quilt
As most important construction material, it is widely used in civil engineering, highway, water conservancy, shipbuilding industry, mechanical industry, the exploitation of ocean,
Geothermal engineering etc..According to statistics, the 1 year concrete usage amount in the whole world in 2016 is about at 10,000,000,000 tons, the use of China's concrete
Amount accounts for about 60% or more of the total usage amount of whole world concrete.With the increase year by year of concrete usage amount, the raw material of concrete
Scarcity of resources is also used as a very serious social concern to highlight.Further, since in China, coarse sand resource distribution it is serious
Unevenness, in, coarse sand resource no matter from the perspective of reserves, sustainable development and cost, not being able to satisfy the present age more and more builds
If the needs of scale.River sand is mainly used in the building sand of many provinces along the Changjiang river, country's limitation now is adopted from the Changjiang river
The contradiction of sand, natural sand shortage of resources and usage amount becomes increasingly conspicuous.Some domestic areas occur broken in processing with stone pit successively
The aggregate chips, natural mountain sand and the artificial sand that generate during stone substitutes natural river sand, but uses mountain sand, aggregate chips and Machine-made Sand not
Concrete quality can only be impacted, and can welding.Therefore, new resource is developed, has walked sustainable development path
Through extremely urgent.
China desert gross area accounts for 6.8% or so of national land area, and about 63.7 ten thousand km2 of the gross area, desert is in China
The several main provinces and regions distributions in northwest.As construction of the West Region scale constantly increases, engineering is growing day by day with sandstone amount, and desert
Since traffic is opposite with resource deficient, engineering sand material is expensive for area and sand ground area.If continuing to use remote fortune
Defeated sand material, not only increases construction cost, since the exploitation of sand material also results in Land Desertification In The Northwest aggravation.
Drift-sand is that natural wind moves the sandy soil to be formed, compared to the sandy soil of other origin causes of formation, drift-sand form particle compared with
It is thin and uniform, belong to ultra fine sand scope.As can the use of drift-sand resource abundant in desert area and sand ground area is aggregate,
Novel drift-sand composite mortar product is developed, to substitute existing conventional cement mortar product and low intensive coagulation local products
Product, application prospect will have great economic significance, while can also prevent the further evil of desert area environment extremely extensively
Change, is also of great significance for ecological environmental protection.
Currently, the research in terms of drift-sand concrete is focused primarily upon for some specific engineering project, only serve
Specific project；Corresponding codes and standards is not also promulgated specifically for drift-sand in country and place, for industry reference.And state
It is inside and outside not resistance under the one or more of factor effects of complex environment (salt contamination, dry and wet, freeze thawing, wind erosion) to drift-sand concrete
Long property exclusively carries out research.In addition, to the research of drift-sand mortar be largely using drift-sand part replace quartz sand or
River sand, the mortar formulating carried out completely using drift-sand as aggregate almost without.Such as Chen Zhifei (2012) has studied sand
Unconcerned husky mix with Machine-made Sand is matched using C50 concrete is prepared, and Wang Na etc. (2004) has made Sahara Desert sand strong concrete
Mix-design and research etc..The country is still more popular for the research of drift-sand concrete, how to make up ultra fine sand
Gradation defect, prepare high-durability, high-dimensional stability and high cracking resistance superfine sand concrete, be in drift-sand concrete urgently
Problem to be solved.In addition, in concrete drift-sand volume very little, or even many research is all only with the substitution of drift-sand part
River sand, and West Region Development still can be restricted the problems such as the economy of the demand generation of a large amount of coarse aggregates, environment in concrete
Construction.Therefore, occur some researchs for drift-sand mortar in recent years, (2003) the research Desert Sands such as Zhang Guoxue are to water
The influence of cement mortar performance；Dong Wei etc. (2013) has done research of the different drift-sand volumes to Mortar'S Flowability and intensity；This
How to wait quietly finding that the incorporation of drift-sand can improve freezing and thawing performance of the mortar under salting liquid outside.Chinese invention CN 107032706
A discloses a kind of sub-surface forming method for using drift-sand as raw material, the more area of drift-sand use drift-sand for
The raw material of surfacing base, adaptation to local conditions reduce engineering cost.103319104 A of Chinese invention CN discloses one kind and contains
The cement of clinker, gypsum and a certain amount of drift-sand, wherein the content of drift-sand is 2-11wt%.Chinese invention CN
102199023 B disclose a kind of building mortar and configuration method using the preparation of desert drift-sand, according to aeolian sand 290: water
Mud 72: flyash 20: water-reducing agent 1.4: air entraining agent 0.3: swelling agent 8: water 62: the proportional arrangement mortar of waterglass 1, for building
Mortar engineering.It can be seen that the domestic research for drift-sand is all largely to rest on part to replace aggregate, it can not be complete
Solve the application problem of drift-sand in practical projects.
Therefore, it develops a kind of all using Inner Mongolia of China drift-sand as aggregate, with Inner Mongol Meng Xi cement and works as
Ground fly ash abundant explores novel additive as modifying agent, to develop novel high property as cementitious material
Energy complex cement aeolian accumulation mortar, can economize on resources, gathers materials on the spot, not destroy local environment, moreover it is possible to guarantee the durability of material
And prolong its service life, to the building of irrigation works for solving the problems, such as the area such as Alxa, Wuhai, Erdos, and by its
It is applied to the project of other large sizes during construction of the West Region, there is important practical significance.
Summary of the invention
To solve the above problems, the purpose of the present invention is to provide a kind of all using Alxa area drift-sand as aggregate,
Using Inner Mongol Meng Xi cement and local fly ash abundant as cementitious material, using novel additive as modifying agent,
Plaster workability is excellent, durable, and freeze thawing resistance is impervious, and shrinkage is good, and cement consumption is few, at low cost, is able to satisfy construction completely
The high-performance complex cement aeolian accumulation mortar of demand.
The present invention provides a kind of modified high performance complex cement aeolian accumulation mortar, the high-performance complex cement aeolian sand
Slurry includes following components in parts by weight: 100 parts of drift-sand, 40-55 parts of cementitious material, and 16-27.5 parts of water, 6-14 parts of water-reducing agent,
0.5-2 parts of water-retaining agent, 0.5-6 parts of air entraining agent, wherein water-cement ratio 0.4-0.5；Wherein, water-cement ratio refers to water and gelling material
The weight ratio of material；
Preferably, the high-performance complex cement aeolian accumulation mortar includes following components in parts by weight: 100 parts of drift-sand,
45-55 parts of cementitious material, 18-27.5 parts of water, 8-12 parts of water-reducing agent, 0.5-1.5 parts of water-retaining agent, 3-6 parts of air entraining agent, wherein water
Glue ratio is 0.4-0.5；
It is highly preferred that the high-performance complex cement aeolian accumulation mortar includes following components in parts by weight: drift-sand 100
Part, 50 parts of cementitious material, 20 parts of water, 10 parts of water-reducing agent, 1 part of water-retaining agent, 5 parts of air entraining agent, wherein water-cement ratio 0.4.
Wherein, the cementitious material is the mixture of cement and flyash, and the weight ratio of flyash and cement is 0.2-
0.5；Preferably, the weight ratio of the flyash and cement is 0.3-0.4；
Wherein, the water-reducing agent is polycarboxylate water-reducer or melamine water reducing agent；Preferably, the water-reducing agent is poly-
Carboxylic acid water reducer；Preferably, the water-reducing agent is the composite water-reducing agent of polycarboxylate water-reducer and melamine water reducing agent, wherein
The weight ratio of polycarboxylate water-reducer and melamine water reducing agent is 2-5；It is highly preferred that the water-reducing agent be polycarboxylate water-reducer and
The composite water-reducing agent of melamine water reducing agent, wherein the weight ratio of polycarboxylate water-reducer and melamine water reducing agent is 4；
Wherein, the water-retaining agent be 400 viscosity cellulose ethers, 10w viscosity cellulose ether or welan gum, preferably 400
Viscosity cellulose ether；
Wherein, the air entraining agent is K12 or triterpenoid saponin, preferably K12.
The beneficial effects of the present invention are:
Modified drift-sand composite mortar product provided by the invention, gathers materials on the spot, does not destroy local environment, economize on resources,
It is novel using cement and local fly ash abundant as cementitious material all using Alxa area drift-sand as aggregate
For additive as modifying agent, the novel prefabricated component mortar and pumping mortar developed can guarantee durability and the extension of material
Its service life to solving the problems, such as the building of irrigation works in the area such as Alxa, Wuhai, and applies it to construction of the West Region process
In other large sizes project, have important practical significance.
(1) flyash causes China's land resource as a kind of industrial solid castoff, the stockpiling of a large amount of flyash
Large area waste, and since its granularity is thinner, when air storage, will cause serious atmosphere pollution under the action of the wind, especially
It is that the environmental problem caused by the Northwest's flyash based on thermal power generation is especially severe.In mortar, flyash
Incorporation can improve the state of drift-sand mortar, and flyash has certain water-reduction, uses a certain amount of flyash
Cement is replaced to can reduce water-reducing agent and cement consumption, to achieve the effect that reduce cost.In addition, the flyash of certain volume
Incorporation can also play the role of reduce mortar drying shrinkage, improve mortar impermeability.It is comprehensive for solid waste coal ash simultaneously
Using providing new way.
(2) modified drift-sand mortar provided by the invention, by glue sand than (cementitious material and drift-sand weight ratio), water
The science collocation of glue ratio (water and cementitious material weight ratio), the addition type of modifying agent and dosage, so that the modification being prepared
Drift-sand mortar, working performance is excellent, durable, and freeze thawing resistance is impervious, and shrinkage is good, and cement consumption is few, at low cost, is entirely capable of
Meet the modification drift-sand composite mortar of construction demand.
Detailed description of the invention
Plane of disruption photo after being cleaved after the impervious experiment of 3 mortar specimen of Fig. 1 embodiment.
Plane of disruption photo after being cleaved after the impervious experiment of 3 mortar specimen of Fig. 2 comparative example.
Mass loss rate after Fig. 3 Frozen-thawed cycled.
Fig. 4 plate experiment photo.
Specific embodiment
The present invention is not limited by the following examples, can determine according to the technique and scheme of the present invention with actual conditions specific
Embodiment.
Drift-sand is derived from WuHai, Inner Mongolia Autonomous Region city；Cement is to cover western P.O42.5；Flyash originates from Inner Mongol cylinder Guo
Strangle city；Polycarboxylate water-reducer is purchased from Suzhou Fu Ke technical concern Co., Ltd；Melamine water reducing agent is auspicious purchased from Shanghai three；400
Viscosity cellulose ether and 10w viscosity cellulose ether are purchased from Shandong Chen Bang Fine Chemical Co., Ltd；K12 builds Sheng science and technology purchased from Hebei
Limited liability company.
Embodiment 1
A kind of high-strength composite cement aeolian accumulation mortar, parts by weight group become；100 parts of drift-sand, 33.3 parts of cement, flyash
6.7 parts, 16 parts of water, 4 parts of polycarboxylate water-reducer, 2 parts of melamine water reducing agent, 400 0.5 part of viscosity cellulose ethers, K12 0.5
Part.
Embodiment 2
A kind of high-strength composite cement aeolian accumulation mortar, parts by weight group become；100 parts of drift-sand, 36.7 parts of cement, flyash
18.3 parts, 27.5 parts of water, 11.7 parts of polycarboxylate water-reducer, 2.3 parts of melamine water reducing agent, 400 2 parts of viscosity cellulose ethers, K12
6 parts.
Embodiment 3
A kind of high-strength composite cement aeolian accumulation mortar, glue sand are 0.5 than (weight ratio of cementitious material and drift-sand), water-cement ratio
(weight ratio of water and cementitious material) is 0.4, parts by weight composition are as follows: 100 parts of drift-sand, 36 parts of cement, and 14 parts of flyash, water
20 parts, 8 parts of polycarboxylate water-reducer, 2 parts of melamine water reducing agent, 400 1 part of viscosity cellulose ethers, 5 parts of K12.
Comparative example 1
A kind of complex cement aeolian accumulation mortar, it is 0.5 that glue sand, which compares, water-cement ratio 0.4, parts by weight composition are as follows: drift-sand 100
Part, 36 parts of cement, 14 parts of flyash, 20 parts of water, 10 parts of polycarboxylate water-reducer, 1 part of 10w viscosity cellulose ether, 5 parts of K12.
Comparative example 2
A kind of complex cement aeolian accumulation mortar, it is 0.3 that glue sand, which compares, water-cement ratio 0.4, parts by weight composition are as follows: drift-sand 100
Part, 21.6 parts of cement, 8.4 parts of flyash, 12 parts of water, 8 parts of polycarboxylate water-reducer, 2 parts of melamine water reducing agent, 10w viscosity is fine
Plain 1 part of the ether of dimension, 5 parts of K12.
Comparative example 3
A kind of complex cement aeolian accumulation mortar, it is 0.5 that glue sand, which compares, water-cement ratio 0.4, parts by weight composition are as follows: drift-sand 100
Part, 36 parts of cement, 14 parts of flyash, 20 parts of water.
Experimental example
1. fluidity is tested
Referring to GB/T50448-2015 " cement-based grouting material application technology specification " using the truncated cone circle of 60*70*100mm
Mould carries out the test of truncated cone fluidity to drift-sand mortar, the results are shown in Table 1.
Table 1
| Group | Truncated cone fluidity/mm |
| Embodiment 1 | 183 |
| Embodiment 1 | 186 |
| Embodiment 3 | 200 |
| Comparative example 1 | 148 |
| Comparative example 2 | It does not form |
| Comparative example 3 | 120 |
2. anti-permeability performance is tested
Regulation, severe cold area large size anti-seepage channel engineering in GB/T50600-2010 " Anti-seepage Engineering Techniques for Irrigation Canals specification "
In, the impermeability pressure of material should be greater than W6.Water conservancy industry standard " concrete gravity dam design specification " SL319-2005 regulation
At hydraulic slope >=50, the minimum allowable value of concrete impervious grade is that (i.e. the lower part of 150m or more high dam upstream face just has W10
So high requirement).As standard, to embodiment 3 and 3 product of comparative example respectively according to JGJ/T70-2009 " building mortar
Basic performance tests method " it forms and its anti-permeability performance is tested, after the completion of test, test block is rived, observes its infiltration
Saturating depth simultaneously photographs to record, and result is as shown in Figs. 1-2.
By test result it can be seen that, the seepage-resistant grade of 3 high-performance complex cement aeolian accumulation mortar of embodiment 1.1MPa with
On, meet the 0.6MPa or more required in GB/T 50600-2010 " Anti-seepage Engineering Techniques for Irrigation Canals specification ".3 mortar of comparative example
Seepage-resistant grade is in 0.6MPa.
3. anti-freezing property is tested
Due to the Northwest's temperature severe cold and day and night temperature is big, has higher requirement to the anti-freezing property of material,
Therefore anti-freezing property test is carried out to the mortar of embodiment 3, referring to GB/T 50082-2009 " normal concrete long-term behaviour and
Endurance quality test method standard " and JGJ/T 70-2009 " building mortar basic performance tests method " formed test block, and it is right
It carries out freezing and thawing test at a slow speed and tests.It is put into after mark supports room maintenance 28d and takes out after test block forming is demoulded, then by test block
It impregnates, takes out test block from water into the water after impregnating 1d, dried the bright water in test block with wet rag and measure its and is wet
Weight.Then test block is put into freeze-thaw cycle tester test piece box and carries out freeze-thaw cycle experiment, every circulation test block of 5 surveys is wet
Weight, calculates test block mass loss, and result is as shown in Figure 3.
4. workability is tested
Whether the formula of verifying product is able to satisfy the requirement of actual construction application, carries out workability to 3 product of embodiment
Test: plate experiment has been carried out.The mortar of embodiment 3 can be easier levelling or pass through vibration after being poured into plate
Kinetic energy makes its quick levelling, and does not have bleeding or bubble to be difficult to phenomena such as excluding in vibration processes, and test block is put down after shaping
Plate surface free from flaw, molding plate photo are as shown in Figure 4.
Claims (6)
1. a kind of high-performance complex cement aeolian accumulation mortar, which is characterized in that the high-performance complex cement aeolian accumulation mortar includes following
The component of parts by weight: 100 parts of drift-sand, 40-55 parts of cementitious material, 16-27.5 parts of water, 6-14 parts of water-reducing agent, water-retaining agent 0.5-2
Part, 0.5-6 parts of air entraining agent, wherein water-cement ratio 0.4-0.5, cement mortar rate 0.5；
The water-reducing agent be polycarboxylate water-reducer and melamine water reducing agent composite water-reducing agent, wherein polycarboxylate water-reducer and
The weight ratio of melamine water reducing agent is 2-5.
2. high-performance complex cement aeolian accumulation mortar as described in claim 1, which is characterized in that the cementitious material is cement
With the mixture of flyash, the weight ratio of flyash and cement is 0.2-0.5.
3. high-performance complex cement aeolian accumulation mortar as claimed in claim 2, which is characterized in that the cementitious material is cement
With the mixture of flyash, the weight ratio of flyash and cement is 0.3-0.4.
4. high-performance complex cement aeolian accumulation mortar as described in claim 1, which is characterized in that the water-reducing agent subtracts for polycarboxylic acids
The composite water-reducing agent of aqua and melamine water reducing agent, wherein the weight ratio of polycarboxylate water-reducer and melamine water reducing agent is
4。
5. high-performance complex cement aeolian accumulation mortar as described in claim 1, which is characterized in that the water-retaining agent is 400 viscous
Spend cellulose ether, 10w viscosity cellulose ether or welan gum.
6. high-performance complex cement aeolian accumulation mortar as described in claim 1, which is characterized in that the air entraining agent be K12 or
Triterpenoid saponin.
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| CN201810160836.6A CN108164197B (en) | 2018-02-27 | 2018-02-27 | A kind of high-strength composite cement aeolian accumulation mortar |
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| CN201810160836.6A CN108164197B (en) | 2018-02-27 | 2018-02-27 | A kind of high-strength composite cement aeolian accumulation mortar |
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| CN116217191A (en) * | 2023-03-22 | 2023-06-06 | 西京学院 | Cold region desert sand composite alkali-activated anti-freezing mortar and preparation and construction methods thereof |
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| CN101823863B (en) * | 2010-05-21 | 2013-03-27 | 深圳广田装饰集团股份有限公司 | Mortar for decorating external wall |
| CN102199023B (en) * | 2011-04-06 | 2012-12-12 | 西安长庆科技工程有限责任公司 | Building mortar prepared by using desert Aeolian sand and preparation method thereof |
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Effective date of registration: 20190408 Address after: 010020 No. 9 Hulunnan Road, Hohhot City, Inner Mongolia Autonomous Region Co-patentee after: Wuhan Sanyuan Special Building Materials Co.,Ltd. Patentee after: The Inner Mongolia Autonomous Region water conservancy and Hydropower Survey and Design Institute Address before: 010020 No. 9 Hulunnan Road, Hohhot City, Inner Mongolia Autonomous Region Patentee before: The Inner Mongolia Autonomous Region water conservancy and Hydropower Survey and Design Institute |