Concrete used in sewer pipes and industrial areas is susceptible to acid attacks that can significantly damage wastewater infrastructure. This investigation addresses the effect of using both mineral and polymer admixtures on the flowability, compressive strength, and the resistance against sulfuric acid and hydrochloric acid attacks on the modified mortars. The cement was replaced by 10% and 15% of metakaolin along with 5% of two polymer powders: ethylene‐vinyl‐acetate and polyvinyl‐acetate. Raw kaolin clay was heated at 800°C for 8 hours to produce metakaolin. The pozzolanic activity was determined by both strength‐activity index and X‐ray diffraction method. A total of 180 specimens was cast and tested for compressive strength and acid resistance. The outcomes revealed that the workability, along with compressive strength, was improved significantly up to 24% and 18.43%, respectively. While acid resistance of modified mortar was also enhanced considerably by 59.9% and 24.9% against hydrochloric and sulfuric acids, respectively, proving the combinations to be very effective against acid attacks. The investigation focuses on resolving the major wastewater infrastructure issue besides acid utilizing industry and leads toward sustainability. Much sustainable, durable, and environment‐friendly mortar compositions have been suggested to be used in areas prone to acid attacks.

中文翻译：

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偏高岭土和混合聚合物砂浆对工业和废水基础设施的抗压强度和耐酸性的有效性

下水道和工业区中使用的混凝土容易受到酸的侵蚀，从而严重破坏废水的基础设施。这项研究解决了同时使用矿物和聚合物混合物对改性砂浆的流动性，抗压强度以及耐硫酸和盐酸侵蚀的影响的问题。用10％和15％的偏高岭土以及5％的两种聚合物粉末（乙烯-醋酸乙烯酯和聚醋酸乙烯酯）代替水泥。将未加工的高岭土在800℃下加热8小时以产生偏高岭土。火山灰活性是通过强度活性指数和X射线衍射法确定的。总共铸造了180个样品，并测试了其抗压强度和耐酸性。结果表明，可加工性以及抗压强度，显着改善，分别达到24％和18.43％。改性砂浆的耐盐酸性和耐硫酸性也分别显着提高了59.9％和24.9％，证明了该组合物对酸侵蚀的防护非常有效。该调查的重点是解决酸利用行业之外的主要废水基础设施问题，并实现可持续性。建议在容易发生酸腐蚀的区域使用许多可持续，耐用和环保的砂浆组合物。该调查的重点是解决酸利用行业之外的主要废水基础设施问题，并实现可持续性。建议在容易发生酸腐蚀的区域使用许多可持续，耐用和环保的砂浆组合物。该调查的重点是解决酸利用行业之外的主要废水基础设施问题，并实现可持续性。建议在容易发生酸腐蚀的区域使用许多可持续，耐用和环保的砂浆组合物。