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由于粉煤灰－石灰原料的塑性比粘土差，导致该砖在生产过程中坯体破损率高。作者通过掺加石膏、粘土等外掺料以改善粉煤灰－石灰原料的塑性，取得了一定的效果。
Due to the poor plasticity of the fly ash-lime material compared to clay, the brick has a high rate of green body breakage during the production process. The authors have achieved certain results by adding gypsum, clay, and other external additives to improve the plasticity of fly ash-lime materials.