Activation Of Fly Ash And Its Grouting Applications

Now the usage of fly ash is urgent problem.Low activation of fly ash is the main reason that the usage of fly ash is limited. The thesis research the activation of fly ash and use it as grout. During the research of activation of fly ash, this thesis analyses and compares the characteristics of two experimental method of uniform design and orthogonal design:(1) Uniform design can largely reduce frequency of experiments, shorten the cycle of the experiment, so it largely economize labor and money;(2) Orthogonal design is integrative and comparative, and can analyses the difference.The best point that we get through analysis is better than other point of the single experiment, and is closer to the factual best point.After analysis and compare, this thesis confirm that two kinds of design method is combined at the different stage during the experiment process, and obtain the following result:(1) During the experiment of fly ash and activating admixtures, this thesis adopt the uniform design, obtain the accelerating activating admixtures and its adding amount , compile computer program concerned, and get the equation of compression strength and bending strength;(2)During the experiment of activated fly ash and cement, this thesis adopt the orthogonal design, and obtain the best appropriate adding amount and water-cement ratio of activated fly ash grout;(3 ) The field practice has proved that activating admixtures not only is grouting and high strength, but also largely economize money, and is an ideal grout.These achievements prove that the methods of experiment design and analysis and data transacting is reliable and successful.The accelerating activating admixtures can activate fly ash effectively. The achievement can apply other fields, such as the building material.