Research on shrinkage of high calcium ash cement-based material in different curing condition

The performance of high calcium ash and its filling mechanism are introduced, and the proportioning tests of high calcium ash filling materials which are adapted to compaction technology and fluidization technology are stated emphatically, so as to explain that high calcium ash can be used in trench filling process.

The strength and the volumetric deformation of cement mortar specimen with different high calcium ash and steel slag dosages in 90 days which were cured in the condition of 20 ℃ and 5% Na2SO4 solution were studied,and XRD were used to analyze the mechanism of volumetric deformation.

Effect of paligorskite and high calcium fly ash on the strength and shrinkage of alkali-slag-fly ash cement;

Mineral modification of high calcium fly ash and the shrinkage mechanism of the composite cement

The mineralogy of coal and chemical composition of high calcium fly ash were studied by low temperature asher (LTA), X-ray diffraction (XRD), and field scanning electron microscopy equipped with energy dispersive X-ray analyzer (FSEM-EDX).

The experiments on humidification desulfurization by high calcium coal ash were carried out at a thermo balance and a semi industrial test ring.

Research on using high-calcium fly ash as the hardening agent of soft soil;

Study on volume stability control of cement paste with large amount of high-calcium fly ash;

Effects of slag,high-calcium fly ash,desulfurized gypsum,calcined desulfurized gypsum and sodium sulfate on early age autogenous shrinkage of cement pastes,long terms of desiccation shrinkage and initial cracking sensitivity of cement mortar are researched.

The effect of Cl-ion on properties of high calcium fly ash cement paste;

The prelinminary study of using high calcium fly ash resource to produce expansive cement;

Influence of high calcium fly ash on the physical property of cement;

Based on the characteristics of high-lime fly ash,a series of modified technology of high-lime fly ash have been developed.

This article takes eliminating the bad stability of HFA,enhances its utilization ratio as the goal,researches the impact of modified high-lime fly ash to the performance of workability、mechanical properties and resistance to chloride ion permeability.