Slag-Fly Ash Mixed Cementitious System Research

Energy saving and synergy are always the problem accepted times attentions in thepetroleum manufacturing and developing in our country. This dissertation is put forward by theprincipal target as achieve the manufacturing and developing of low-cost and saving energymaterial the oil and gas well cementing job. It is put as the center content that using theindustrial discharge slag and fly ash as the fundamental material to develop the new cementingmaterial without cement clinker. Through doing the best to launch the systematical experimentand theoretical research to the system. Looking for and developing the practicable way and thesystem design method of new cementing material can be contented to the conventionalcementing job demand. The completion of the dissertation research achievement, not only candirectly reduce the cementing material cost and enhance the benefit of oil and gas fieldexploiting, but also can expand the apply of industrial waster in production. It also has veryimportant significance in some parts such as saving production resources and energy andprotecting environment.On the base of analyzing the physical and chemical performance of slag and fly ash, thedissertation analyzes and researches the hydration process, hydration products, morphology andmicrostructure for the mixed cementitious system by using equipment as XRD and SEM etc. Itreveals the law and mechanism of hydration and hardening in the slag-fly ash mixedcementitious system. And through carrying on the related survey and analysis to the mainengineering capacity transformation of the multi-component system formed by slag and fly ashin different component addition, different activator and additives component and addition,different water-cement ratio condition, such as flow property, rheological property, thickeningproperty, water loss, permeability and strength property etc. It puts forward the law that thefactors as grain fraction, component addition, water-cement ratio etc. of slag, fly ash andalkali-activator and other additives affect the engineering capacity of mixed cementitioussystem. Thus it evaluates the applications of the mixed cementitious system optimized to the oiland gas well conventional cementing job. Thereby it can supply the technical developmenttheory, the experiment foundation and the practicable way for exploring the saving energy,protecting environment and low-cost cementing fluid system.