Lime Brust of Sintering Bricks of Purple Sandy Shale: the Effect of Limestone Particle Size

Zhi Gang Feng; Zhen Ping Tang; Hui Juan Li

doi:10.4028/www.scientific.net/AMR.250-253.46

Paper Titles

Accelerate Thaumasite Formation in Cement-Limestone Powder Paste by Internal Adding Method
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Mechanical Characteristics of Concrete Exposed to External Flexural Load, De-Icing Salt and Freeze-Thaw Cycles
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Effectiveness and Mechanism of Fly Ash in Inhibiting Alkali-Silica Reaction of Sandstone
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Lime Brust of Sintering Bricks of Purple Sandy Shale: the Effect of Limestone Particle Size
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The Strain-Energy Criterion of Iso-σ_θε_θ Line for Mixed Mode Crack in Concrete
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The Roles of B₂O₃ and P₂O₅ in the Formation of Cement Clinker
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Experimental Research about Weathering Resistance and Surface Deterioration of Two Kinds of Stone Cultural Relics
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Experimental Study on Dynamic Characteristics of Sandy Pebble Soil
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 250-253Lime Brust of Sintering Bricks of Purple Sandy...

Lime Brust of Sintering Bricks of Purple Sandy Shale: the Effect of Limestone Particle Size

Abstract:

Simulating current sintering process in local brickkilns, Hengyang region, Hunan Province, China, at 800°C, througt indoor sintering experiment on a series of brick samples of purple sandy shale, in which particle sizes of limestone are >-1Φ, >0Φ, >1Φ, >2Φ, >3Φ and >4Φ, respectively, it is concluded that the following: (1) Limestone granularity is a crucial factor affecting the quality of sintering bricks of purple sandy shale. Under different particle sizes, the critical content of limestone causing lime brust of sintering bricks is distinct, and lowers with the increasing in limestone granularity. (2) When limestone granularity is different, its impact way on the quality of sintering bricks is also distinct. The more coarse limestone granularity is, the more concentrative the swelling stress produced by the hydration of free CaO is, the more easily lime brust occurs. On the contrary, the more fine limestone granularity is, the more dispersive the swelling stress is, there is the more help to reduce or eliminate the occurrence of lime brust. (3) In view of the relationship between limestone granularity and the critical content of limestone giving rise to lime brust of sintering bricks, the production practice can be effectively guided.