CN102515612A - Environmentally-friendly cement-based reinforced thickening agent for dry-mixed mortar and preparation method thereof - Google Patents
Environmentally-friendly cement-based reinforced thickening agent for dry-mixed mortar and preparation method thereof Download PDFInfo
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- CN102515612A CN102515612A CN2011103845237A CN201110384523A CN102515612A CN 102515612 A CN102515612 A CN 102515612A CN 2011103845237 A CN2011103845237 A CN 2011103845237A CN 201110384523 A CN201110384523 A CN 201110384523A CN 102515612 A CN102515612 A CN 102515612A
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Abstract
The invention provides an environmentally-friendly cement-based reinforced thickening agent for dry-mixed mortar. The thickening agent comprises unhydrated cement particles, C-S-H gel, calcium hydroxide, cellulose ether and lignosulfonate. The invention further provides a preparation method of the environmentally-friendly cement-based reinforced thickening agent for dry-mixed mortar. The method comprises the following steps of: adding modifying agents such as cellulose ether and lignosulfonate into cement paste powder left after the production of recycled aggregate with waste concrete; grinding to certain fineness; and stirring uniformly. By doping the reinforced thickening agent disclosed by the invention into the dry-mixed mortar, the compressive strength and the bonding strength of mortar can be enhanced remarkably, gelled materials such as cement, fly ash and slag powder in mortar are replaced in a high ratio, and the raw material cost is reduced; and meanwhile, freshly mixed mortar can have high thickening property, high water holding capacity and high sagging resistance. The thickening agent can be widely applied to various cement-based dry-mixed mortar products in construction engineering, and has good social and economic benefits.
Description
Technical field
The present invention relates to the field building material technical field, be specifically related to a kind of dry-mixed mortar and strengthen thickening material and preparation method thereof with environment protecting cement-base.
Background technology
Along with the fast development of construction industry, concrete also increases as the usage quantity of most important material of construction year by year, and As time goes on the discarded concrete of generation also can be on the increase, and causes various environment and resource problem.Through recycling, will have huge social benefit, environmental benefit and economic benefit to waste and old concrete.
In production processes such as the fragmentation of regeneration aggregate, screening, < fine powder material about 2.0mm need screen out, otherwise can influence the quality of regeneration aggregate inevitably can to produce particle diameter; And this part fine powder material certainly will cause secondary pollution if be not used.In the regeneration concrete fine powder material about 2.0mm is mainly formed with hardened cement paste and mortar, and the CaCO3 in the discarded concrete micro mist, cement gel and not the hydrated cement particle have respectively form calcium aluminate of hydrated carbon and aquation carbon Calucium Silicate powder, as the hydrated cementitious embryos with continue the ability of aquation formation jel product; Drated calcium aluminate and hydrated calcium silicate all have stronger need water-based and water-retentivity in addition.Hardened cement paste accounts at more than 30% of discarded concrete quality, the part that this is resource and an energy consumption maximum in the middle of the cement concrete all components, carrying capacity of environment is the heaviest, Financial cost is the highest.Dewater in the hardened cement paste outside the muddy water product, also comprise a certain amount of not hydrated cement particle, wc is low more, and the hydrated cement particle is not many more.Wuzhong is big waits the people to think: when wc is 0.35, in theory (no moisture loses) not hydrated cement account for 16.2% of hardened cement paste consubstantiality component.Under the practice of construction condition, concrete not hydrated cement is worth far above this.
Summary of the invention
In view of this, be necessary to be directed against the problem that background technology is mentioned, provide a kind of novel
The present invention realizes through following technical scheme:
A kind of dry-mixed mortar strengthens thickening material with environment protecting cement-base; Content of various compositions is in it: is benchmark with particle diameter less than cement slurry, the mortar 1000kg of 2.0mm, adds 2 ~ 10kg sodium lignosulfonate, 0.1 ~ 0.5kg hydroxyl first/TKK 021 enzyme, 0 ~ 10kg alkali-activator.
A kind of dry-mixed mortar may further comprise the steps with the preparation method of environment protecting cement-base enhancing thickening material:
S1, raw materials pretreatment: remaining particle diameter is dried less than cement slurry, the mortar of 2.0mm after will utilizing discarded concrete to produce regeneration aggregate;
S2, batching metering: getting the raw material of S1 gained, is benchmark with 1000Kg, adds 2～10Kg sodium lignosulfonate, 0.1～0.5kg hydroxyl first/TKK 021 enzyme, 0～10kg alkali-activator etc.;
S3, the mixture of S2 gained is put into the planetary stream of opening carry out grinding, mixing, stirring in the ball mill; Control grinding speed and the time makes the powder specific surface area reach 350 ㎡/more than the Kg, do not reach 350 ㎡/Kg like the powder specific surface area, then returns S2.
As optimization, described dry-mixed mortar also comprises with the preparation method that environment protecting cement-base strengthens thickening material:
S4, the dry-mixed mortar that the powder specific surface area is reached more than 350 ㎡/Kg change entrepot storage earlier over to environment protecting cement-base enhancing thickening material product; Treat that quantity acquires a certain degree; Then getting into homogenizing storehouse mixes and all changes into product a collection of time; Sampling is carried out correlated performance and is detected, and provides product according to detected result and use recommendation.
Compared with prior art, the present invention possesses following advantage:
1, makes full use of discarded concrete and produce the remaining fine powder material of regeneration aggregate, reduce environmental pollution;
2, reduced the consumption of cement and flyash, energy-saving and cost-reducing;
3, in the dry-mixed mortar production process, can no longer add thickening, plasticizing component, the trouble of removing metering from and mixing;
4, can effectively improve workability, ultimate compression strength and the stretch-bonded performance etc. of dry-mixed mortar;
5, the soil that has reduced the chip offal treatment and taken.
Description of drawings
Fig. 1 is preparing method's of the present invention technological process of production figure.
Embodiment
Embodiment one:
The dry-mixed mortar of the embodiment of the invention strengthens thickening material with environment protecting cement-base; Content of various compositions is in it: is benchmark with particle diameter less than cement slurry, the mortar 1000kg of 2.0mm; Add 2 ~ 10kg sodium lignosulfonate; 0.1 ~ 0.5kg hydroxyl first/TKK 021 enzyme, 0 ~ 10kg alkali-activator etc.
Wherein, said particle diameter can be selected from discarded concrete less than cement slurry, the mortar of 2.0mm and produce remaining mortar behind the regeneration aggregate.
Embodiment two:
As shown in Figure 1, the preparation method of embodiment one is following:
S1, raw materials pretreatment: remaining particle diameter is dried less than cement slurry, the mortar of 2.0mm after will utilizing discarded concrete to produce regeneration aggregate;
S2, batching metering: getting the raw material of S1 gained, is benchmark with 1000Kg, adds 2～10Kg sodium lignosulfonate, 0.1～0.5kg hydroxyl first/TKK 021 enzyme, 0～10kg alkali-activator etc.;
S3, the mixture of S2 gained is put into the planetary stream of opening carry out grinding, mixing, stirring in the ball mill; Control grinding speed and the time, make the powder specific surface area reach 350 ㎡/more than the Kg; Do not reach 350 ㎡/Kg like the powder specific surface area, then return S2;
S4, the product that the powder specific surface area is qualified change entrepot storage over to earlier, treat that quantity acquires a certain degree, and then get into homogenizing storehouse and mix and all change into product a collection of time, and sampling is carried out correlated performance and detected, and provide product according to detected result and use recommendation.
The contriver tests with the effect that environment protecting cement-base strengthens thickening material and prior art the present invention's dry-mixed mortar, and relevant form and result are as follows.
The proportioning of table 1 M7.5 masonry mortar at present commonly used and 1:3 motar
| Model | Cement (Kg) | Flyash (Kg) | Medium sand (Kg) | Ether of cellulose (Kg) | Fluidizer (Kg) |
| The M7.5 masonry mortar | 215 | 60 | 1000 | / | 0.5 |
| The 1:3 motar | 250 | 90 | 1000 | 0.2 | 0.7 |
Table 2 is used the proportioning of M7.5 masonry mortar of the present invention
| Numbering | Cement (Kg) | Flyash (Kg) | Medium sand (Kg) | The present invention (Kg) |
| M7.5 builds C20% by laying bricks or stones | 170 | 50 | 1000 | 55 |
| M7.5 builds C15% by laying bricks or stones | 180 | 40 | 1000 | 55 |
| M7.5 builds C10% by laying bricks or stones | 190 | 30 | 1000 | 55 |
Table 3 is used the proportioning of 1:3 motar of the present invention
| Numbering | Cement (Kg) | Flyash (Kg) | Medium sand (Kg) | The present invention (Kg) |
| The 1:3 C20% that plasters | 200 | 70 | 1000 | 70 |
| The 1:3 C15% that plasters | 212 | 58 | 1000 | 70 |
| The 1:3 C10% that plasters | 225 | 45 | 1000 | 70 |
Test-results is seen table 4
| Numbering | Denseness/mm | Water retention/% | 7d intensity/MPa | 28d intensity/MPa | 14d tensile bond strength/MPa | Cost/unit |
| The M7.5 masonry mortar | 75 | 84.5 | 5.8 | 11.8 | 0.53 | 122.7 |
| M7.5 builds C15% by laying bricks or stones | 70 | 92.8 | 6.2 | 12.5 | 0.49 | 119.4 |
| M7.5 builds C10% by laying bricks or stones | 75 | 93.2 | 6.8 | 13.1 | 0.54 | 121.0 |
| The 1:3 motar | 90 | 95.3 | 9.4 | 16.5 | 0.72 | 149.1 |
| The 1:3 C20% that plasters | 100 | 95.6 | 8.9 | 16.6 | 0.69 | 135.8 |
| The 1:3 C15% that plasters | 95 | 94.8 | 9.8 | 17.3 | 0.79 | 137.7 |
| The 1:3 C10% that plasters | 90 | 95.1 | 10.3 | 18.5 | 0.76 | 139.8 |
Remarks: material cost is pressed 350 yuan/ton of PC32.5 cement, 180 yuan/ton in flyash, 250 yuan/ton of the present invention, 35 yuan/ton in sand, 40,000 yuan/ton of ether of cellulose, 2000 yuan of/ton meters of softening agent.
Performance and cost by mortar in the proportioning of the M7.5 masonry mortar in table 1, the table 2 and the table 4 can be found out; Use the present invention to replace a certain proportion of cement and flyash; When fixedly consumption was 55kg, the denseness of mortar, ultimate compression strength and 14d tensile bond strength were identical with benchmark, but the cost of mortar has certain decline; Particularly have thickening properties among the present invention, the water-retentivity of mortar increases substantially.
Performance and cost by mortar in the proportioning of the 1:3 motar in table 1, the table 3 and the table 4 can be found out; Use the present invention to replace a certain proportion of cement and flyash; When fixedly consumption was 70kg, the denseness of mortar, ultimate compression strength and 14d tensile bond strength were identical with benchmark.Have thickening properties among the present invention, a certain amount of thickening material effect is suitable with mixing outward, and the water-retentivity of mortar remains on about 95% basically; But because the 1:3 motar can not need the outer expensive thickening material of mixing, the cost of mortar reduces significantly.
The above is merely enforcement reference of the present invention; The use recommendation that detailed applications suggestion provides when seeing product export of the present invention; All testing datas are not limited to the present invention, for a person skilled in the art, can carry out necessary change and variation according to performance.All within spirit of the present invention and principle, any modification of being done, improvement etc. all should be included within protection scope of the present invention.
Claims (3)
1. a dry-mixed mortar strengthens thickening material with environment protecting cement-base; It is characterized in that: content of various compositions is in it: is benchmark with particle diameter less than cement slurry, the mortar 1000kg of 2.0mm; Add 2 ~ 10kg sodium lignosulfonate; 0.1 ~ 0.5kg hydroxyl first/TKK 021 enzyme, 0 ~ 10kg alkali-activator.
2. a dry-mixed mortar strengthens the preparation method of thickening material with environment protecting cement-base, it is characterized in that:
May further comprise the steps:
S1, raw materials pretreatment: remaining particle diameter < dry by 2.0mm cement slurry, mortar after will utilizing discarded concrete to produce regeneration aggregate;
S2, batching metering: getting the raw material of S1 gained, is benchmark with 1000Kg, adds 2～10Kg sodium lignosulfonate, 0.1～0.5kg hydroxyl first/TKK 021 enzyme, 0～10kg alkali-activator;
S3, the mixture of S2 gained is put into the planetary stream of opening carry out grinding, mixing, stirring in the ball mill; Control grinding speed and the time makes the powder specific surface area reach 350 ㎡/more than the Kg, do not reach 350 ㎡/Kg like the powder specific surface area, then returns S2.
3. method according to claim 2 is characterized in that: described dry-mixed mortar also comprises with the preparation method that environment protecting cement-base strengthens thickening material:
S4, the dry-mixed mortar that the powder specific surface area is reached more than 350 ㎡/Kg change entrepot storage earlier over to environment protecting cement-base enhancing thickening material product; Treat that quantity acquires a certain degree; Then getting into homogenizing storehouse mixes and all changes into product a collection of time; Sampling is carried out correlated performance and is detected, and provides product according to detected result and use recommendation.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103408237A (en) * | 2013-07-17 | 2013-11-27 | 安徽中铁工程材料科技有限公司 | Alkali-free and chlorine-free concrete admixture activity activator |
| CN104446166A (en) * | 2014-08-28 | 2015-03-25 | 南通众润混凝土有限公司 | Method for preparing masonry mortar by utilizing scrap grout of concrete mixing plant |
| CN104529340A (en) * | 2015-01-26 | 2015-04-22 | 江西省建筑材料工业科学研究设计院 | Dry-mixed mortar composite mineral powder plasticizer and preparation method thereof |
| CN105924028A (en) * | 2016-04-25 | 2016-09-07 | 东南大学 | Special additive for regenerated fine aggregate pre-mixed mortar and application thereof |
| CN111747701A (en) * | 2020-05-28 | 2020-10-09 | 山西佳维新材料股份有限公司 | Premixed dry-mixed mortar and application thereof |
| CN111847971A (en) * | 2020-07-02 | 2020-10-30 | 武汉理工大学 | Construction waste micro-powder-based thickening agent and preparation method and application thereof |
| CN112707666A (en) * | 2020-12-30 | 2021-04-27 | 浙江钱塘江水利建筑工程有限公司 | Special additive for hydraulic structure water-permeable pointing mortar and preparation and use methods thereof |
| CN114315217A (en) * | 2021-11-15 | 2022-04-12 | 广东鸿丰水泥有限公司 | Cement thickener utilizing industrial solid wastes |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103408237A (en) * | 2013-07-17 | 2013-11-27 | 安徽中铁工程材料科技有限公司 | Alkali-free and chlorine-free concrete admixture activity activator |
| CN103408237B (en) * | 2013-07-17 | 2015-06-03 | 安徽中铁工程材料科技有限公司 | Alkali-free and chlorine-free concrete admixture activity activator |
| CN104446166A (en) * | 2014-08-28 | 2015-03-25 | 南通众润混凝土有限公司 | Method for preparing masonry mortar by utilizing scrap grout of concrete mixing plant |
| CN104446166B (en) * | 2014-08-28 | 2016-05-04 | 南通众润混凝土有限公司 | A kind of method of utilizing concrete mixing plant scrap grout to prepare masonry mortar |
| CN104529340A (en) * | 2015-01-26 | 2015-04-22 | 江西省建筑材料工业科学研究设计院 | Dry-mixed mortar composite mineral powder plasticizer and preparation method thereof |
| CN105924028A (en) * | 2016-04-25 | 2016-09-07 | 东南大学 | Special additive for regenerated fine aggregate pre-mixed mortar and application thereof |
| CN111747701A (en) * | 2020-05-28 | 2020-10-09 | 山西佳维新材料股份有限公司 | Premixed dry-mixed mortar and application thereof |
| CN111847971A (en) * | 2020-07-02 | 2020-10-30 | 武汉理工大学 | Construction waste micro-powder-based thickening agent and preparation method and application thereof |
| CN112707666A (en) * | 2020-12-30 | 2021-04-27 | 浙江钱塘江水利建筑工程有限公司 | Special additive for hydraulic structure water-permeable pointing mortar and preparation and use methods thereof |
| CN112707666B (en) * | 2020-12-30 | 2022-04-29 | 浙江钱塘江水利建筑工程有限公司 | Special additive for hydraulic structure water-permeable pointing mortar and preparation and use methods thereof |
| CN114315217A (en) * | 2021-11-15 | 2022-04-12 | 广东鸿丰水泥有限公司 | Cement thickener utilizing industrial solid wastes |
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Application publication date: 20120627 |