Research on the formulation of fly ash gelling agent.
I. Introduction. Fly ash, as an industrial waste, not only poses a pressure on the environment, but also wastes a lot of resources. As science and technology advances, researchers are looking for ways to convert fly ash into valuable materials. Among them, the conversion of fly ash into gelling agent is an important research direction. The purpose of this article is to ** a formulation of fly ash gelling agent for reference.
2. Materials and methods.
Material: Main materials: fly ash, lime, gypsum, Portland cement.
Auxiliary materials: water, admixtures (such as water reducers, plasticizers, etc.).
Equipment: ball mill, mixer, press, curing room, etc.
Method: 1) Fly ash, lime and gypsum were mixed according to a certain proportion, and Portland cement was added for preliminary mixing.
2) Put the preliminarily mixed material into the ball mill for ball mill treatment, so that the raw material is more fine, increase its specific surface area, and improve the reactivity of the material.
3) Add an appropriate amount of water and admixtures to the material after ball milling treatment, stirring and homogenization.
4) The homogenized material is pressed to make a semi-finished product of a certain shape.
5) Put the semi-finished products into the curing room for curing, so that the hydration reaction will occur to form a stable cementitious material.
6) The semi-finished product after curing is the finished product of fly ash gelling agent.
3. Formula optimization and performance evaluation.
Formulation optimization: In order to obtain a fly ash gelling agent with excellent performance, the formulation needs to be optimized. The direction of optimization includes: raw material ratio, ball milling time, type and amount of admixture, etc. Through methods such as orthogonal experimental design, the optimal combination of formulations can be obtained. In this process, several indicators are considered, such as compressive strength, flexural strength, setting time, etc. Through continuous testing and adjustment, the fly ash gelling agent formula with stable performance and reasonable cost can be obtained.
Performance evaluation: The performance evaluation of the optimized fly ash gelling agent mainly includes the following aspects: physical properties (such as compressive strength, flexural strength, etc.), chemical stability (such as resistance to acids, alkalis, salts and other chemicals), construction performance (such as construction convenience, maintenance simplicity, etc.). The evaluation method can be carried out using standard test methods or practical application evaluation methods. Through the comparison and analysis of the results of performance evaluation, the application scope and applicable conditions of fly ash gelling agent can be determined.
IV. Results and Discussion.
After formula optimization and performance evaluation, we obtained a fly ash gelling agent with excellent performance. The proportion of its main raw materials is: fly ash 50% 60%, lime 10% 20%, gypsum 10% 20%, Portland cement 10% 20%. The ball grinding time is 60 90 minutes, and the type and dosage of admixtures are adjusted according to actual needs. The fly ash gelling agent has excellent physical properties and chemical stability, and can be used in many aspects of construction, roads, water conservancy and other fields. At the same time, the cost of the formula is reasonable, which can reduce the engineering cost and improve the engineering efficiency. The advantages and disadvantages of the formula were mentioned during the discussion, and suggestions and suggestions for improvement were put forward. In the future, new fly ash gelling agent formulations can be further researched and developed to meet the needs and requirements of different projects.
V. Conclusions and prospects.
In this paper, the formulation of a fly ash gelling agent is described, and its optimization and performance evaluation are carried out. The results show that the formulation has good physical properties and chemical stability, and can be used for engineering applications in multiple fields. In the future, new fly ash gelling agent formulations can be further researched and developed to meet the needs and requirements of different projects. At the same time, it is also necessary to strengthen the comprehensive utilization of industrial wastes such as fly ash to promote the development of circular economy and the sustainable use of resources.