A kind of aliphatic water reducing agent prepared by utilizing straw and preparation method thereof
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A technology of aliphatic water-reducing agent and straw, which is applied in the field of aliphatic water-reducing agent and its preparation, can solve the problems that have not yet seen the experimental application effect, achieve good promotion and application prospects, improve low water-reducing rate, and improve retardation bad effect
Inactive Publication Date: 2017-12-19
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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Problems solved by technology
However, the use of crop straw to directly prepare aliphatic water reducers has not yet seen good tests and reports with good application effects.
Method used
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Embodiment 1
[0047] The aliphatic water reducer prepared from straw provided in this example is specifically prepared through the following steps:
[0048] (1) Pretreating the straw, which is wheat straw;
[0049] After crushing the straw through a 40-mesh sieve, take 20 g as a test sample, add 200 mL of sulfuric acid with a mass concentration of 2%, stir and mix evenly, soak for 24 hours, filter and rinse the straw with water until it is neutral, and then set aside;
[0050] (2) Preparative aliphatic water reducer, the specific process is:
[0051] First, add 10 mol of water to the reaction kettle, then add 0.4 mol of sodium sulfite to fully dissolve, and use strong stirring to assist in accelerating the dissolution of sodium sulfite;
[0052] Second, add 0.9 mol of acetone to the above-mentioned dissolved sodium sulfite solution, sulfonate for 10 minutes; then add 12 g of straw pretreated in step (1), and stir for 30 minutes;
[0053]Third, slowly add 4.5 mol of formaldehyde (formaldeh...
Embodiment 2
[0056] The preparation method of the aliphatic water-reducer prepared from straws provided in this example is the same as that in Example 1, except that some material types and dosages have been properly adjusted, as described below.
[0057] In this example, corn stalks are used to prepare aliphatic water reducer, and the straw pretreatment is soaked in hydrochloric acid with a mass concentration of 4%. During the preparation of aliphatic water reducer, in terms of molar ratio, water: sodium sulfite: acetone : formaldehyde=10:0.3:0.8:4; the amount of straw after pretreatment is 11.25g;
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Abstract
The invention relates to the technical field of preparation of water reducers of construction engineering, in particular to an aliphatic water reducer prepared from straw and a preparation method thereof. The water reducer is prepared in the steps of washing straw with acid, modifying an aliphatic water reducer with the straw and the like. The defect that an existing biologic water reducer product is low in water reduction rate is overcome, the defect that when the aliphatic water reducer is used, concrete separation, weepage and retardation effects are poor is overcome, environmental friendliness and economic efficiency are good, and application and popularization prospects are good. The water reducer has the technical advantages that waste straw resources are effectively used, the defect that the existing aliphatic water reducer is poor in retardation effect is overcome, the application range of the aliphatic water reducer is widened, reaction conditions and the proportion of reactants in the preparation process of the aliphatic water reducer are optimized, stability of product quality can be better protected, and production cost is reduced.
Description
technical field [0001] The invention relates to the technical field of water reducer preparation for construction engineering, in particular to an aliphatic water reducer prepared from straw and a preparation method thereof. Background technique [0002] At present, there are many types of water reducers on the market, including polycarboxylate, aliphatic, naphthalene, sulfamate, and modified lignin. The effect of water is the most significant, but with the decrease of its main raw material oil and the rise of its price, its market price remains high; the production of naphthalene-based water reducers is relatively large in my country, and its performance is relatively superior, but in the production process It consumes a lot of energy and will produce by-products that pollute the environment. In addition, if the measures are not taken properly during production, it will have adverse effects on the environment and humans; the preparation cost of sulfamate and modified lignin w...
Claims
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Application Information
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Patent Type & Authority Patents(China)
IPC IPC(8): C08G16/06C04B24/16C04B103/30
CPCC04B24/166C04B2103/302C08G16/06
Inventor 郭毅萍李国亭刘秉涛朱卫勇李娜胡兴星
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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