Study On Semi-rigid Base Materials Composite Admixture

In recent years, the international highway engineering attaches great importance to the problem of crack of semi-rigid base material, especially cement-flyash stabilized aggregate and lime-fly ash stabilized aggregate. To solve the problem, this essay focuses on compound additive agent to improve cement-flyash stabilized aggregate base material performance of anti-crack, and approach using Activator to improve the activity of low-activity fly ash。Compound additive agent as an excellent architectural material has been widely used in high performance cement field which has much similarity with cement-stabilized aggregate. A lotof research has been done to improve the performance of anti-crack of cement-stabilizedaggregate by compound additive agent, but the level of compound additive agent scientificresearch is still resting on a primary phase .There is few project dealing with performance, technical characteristic and functionary mechanism of compound additive agent. In a word, it has luciferous foreground in the field of additive agent. In this paper, the principle of activation of fly ash were analyzed, and for Pingliang region is generally low activity of fly ash characteristics, the methods to use of a variety of activation on the fly to stimulate activity are used.This essay tries tio improve thr performance of mineral additive agent and compound many kinds of existing chemic additive agent.The scheme of this essay begins with research of reasonable dosage of additive agent, aims at improve the integrated performance of mixture by enhancing the the nature of binder. The mixture design hold the gradation and cement proportion unchangeable, carry on research of performance of mixture based on the optimal content of additive agent and the analysis of microcosmic mechanism has been appended to. At last, this essay tries to find the relationship between additive agent and its performance, and gives a proposal about the most excellent additive agent which has a best behave of integrated performance. This artiSe focuses on different combinations of mixing a combination of admixtures and mixing feed additive combination of the different types of materials have been studied, depth analysis of the admixture of properties of several different binder, the economic and efficient high-performance cement-flyash stabilized aggregate (HPB) has been raised.