Research on Frost Damage of Ancient Building Blue Brick Wall of Longshengzhuang in Inner Mongolia

Abstract

Abstract: Analysis suggested that freeze-thaw is the main reason of causing severe diseases in the blue brick wall of Longshengzhuang ancient buildings. In order to study the effect of severe cold environment on the deterioration ancient building walls, the freeze-thaw test of blue brick specimen was conducted, and the changes of weight, compressive strength and surface hardness before and after freeze-thaw were analyzed. The Weibull distribution theory was used to establish the damage model of the blue brick in freeze-thaw environment under the three indexes of weight, compressive strength and hardness, and the model were modified by unifying the format factor m value of the three damage models. The results show that the compressive strength, mass loss amount, and surface Vickers hardness show an exponential decline with the increase of freeze-thaw cycles; the damage degree of surface hardness is higher than weight and compressive strength under the same freeze-thaw cycles. The Weibull damage model of blue brick under freeze-thaw cycle has a high degree of consistency with the experimental curves. The modified freeze-thaw damage model also reflects the damage law of blue brick in severe cold environment.

Key words: blue brick of ancient building, freeze-thaw cycle, weight loss, compressive strength, hardness, damage model

CLC Number:

TU522.1

HAO Yunhong, HE Dandan, WU Rigen, HE Xiaoyan. Research on Frost Damage of Ancient Building Blue Brick Wall of Longshengzhuang in Inner Mongolia[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(7): 2438-2446.

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