Premixed mortar additive, and preparation technology and applying method thereof
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A technology of ready-mixed mortar and application method, which is applied in the field of construction mortar, can solve the problems of generating a large amount of dust, insufficient mixing, unfavorable environmental protection, etc., and achieves increased tensile bond strength, improved workability, water retention rate, and improved The effect of frost resistance
Inactive Publication Date: 2017-09-15
杭州构建新型材料有限公司
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[0005] However, most of the existing admixtures are solid powders, which are easy to generate a large amount of dust during production, processing and transportation, which is not conducive to environmental protection, and after adding
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Embodiment 1
[0081] Example 1: Ready-mixed mortar admixture, the components included and their corresponding weight percentages are shown in Table 1, and A mixture and B mixture are prepared by the following steps:
[0082] S1, prepare A mixture: weigh the water of the corresponding weight percentage, start stirring, the stirring speed is 800rpm,
[0083] Slowly add thickener (Wenlun rubber), water reducer (HG-PCA600 polycarboxylate high-performance water reducer), air-entraining agent (air-entraining agent AE-2), foam stabilizer Agent (cocamidopropyl hydroxysulfobetaine CHSB), fully mixed for 25-35min, prepared A mixture;
[0084] S2, prepare B mixture: take the water of corresponding weight percent, start to stir, stirring speed is 300rpm, slowly add the retarder of corresponding weight percent (the ratio of weight percent is 1.2:3.6:1 sodium gluconate , white sugar, and sodium hexametaphosphate), and stir evenly to obtain the B mixture.
[0085] In the process of mixing with wet-mixed...
Embodiment 2
[0086] Example 2-9: Ready-mixed mortar admixture, the difference from Example 1 is that the components and their corresponding weight percentages are shown in Table 1, and the water reducer used in Example 2 is QS-8020 polycarboxylate Acid high performance water reducer.
[0087] Components and their corresponding weight percentages in table 1 embodiment 1-9
[0088]
[0089] Components and corresponding parts by weight of wet-mixed mortar in Table 2 Embodiment 1-9
[0090]
Embodiment 10
[0091] Embodiment 10: ready-mixed mortar admixture, the difference from embodiment 1 is that the thickener is polyacrylate copolymer emulsion.
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Abstract
The invention discloses a premixed mortar additive, and a preparation technology and an applying method thereof. The premixed additive comprises a mixture A and a mixture B, and the mixture A comprises a thickener, an air entraining agent, a foam stabilizer, a water reducer and water; the mixture B comprises, by weight, a retarder and water; the thickener comprises at least one of welan gum, a polyacrylate copolymer emulsion, starch and carboxymethyl cellulose; the air entraining agent comprises one of AE-2, fatty acid sodium sulfate and calcium lignosulfonate; the foam stabilizer includes one of cocoamido propyl hydroxy sulfobetaine (CHSB) and a composite foam stabilizer formed by polyvinyl alcohol and calcium stearate; the water reducer is selected from a polycarboxylic high performance water reducer; and the retarder comprises at least two of sodium gluconate, white sugar and sodium hexametaphosphate. The premixed mortar additive has the advantages of improvement of the workability and the water retention rate of a mortar, increase of the tensile bond strength, increase of the air content, and easiness in realization of the control of the opening time.
Description
technical field [0001] The invention relates to the technical field of building mortar, more specifically, it relates to a ready-mixed mortar admixture and its preparation process and application method. Background technique [0002] Ready-mixed mortar is wet-mixed mortar or dry-mixed mortar produced by professional manufacturers. [0003] Dry-mixed mortar is a dry powder building material that is composed of solid materials such as cementitious materials, mineral admixtures, fine aggregates, and admixtures, and is pre-mixed through a dry-mixing process according to a certain ratio. However, since the dry-mixed mortar is easy to segregate during transportation, and the raw sand needs to be dried and then screened in multiple stages, the energy consumption is high; the dust generated during the dry-mixing process is large, it is difficult to remove dust, and it pollutes the environment. The quality of dry-mixed mortar is stipulated by the state: when preparing dry-mixed mort...
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