Analysis of the Strength of Different Minerals-Modified MPC Based on Mathematical Models

IF 3.6 3区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY
Qi Kang, Jingxin Bao, Ran Li, Yingying Zuo, Yanxia Ye, Hua Huang
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Abstract

The study discussed the effects of different mineral incorporations and the curing time on the strength of modified magnesium phosphate cement (MPC) mortars through mechanical tests, mathematical model analysis and microstructure characterization. Fly ash (FA), silica fume (SF), and metakaolin (MK), which exhibit excellent durability and bonding properties, were used to modify the MPC. A quantitative relationship was established between the strength of modified MPC mortars and the mineral incorporation and curing time. First, the strength of each mineral-modified MPC mortar cured in air with different mineral incorporations and curing durations was evaluated. The strengths of MPC mortars containing 10% fly ash, 15% silica fume, and 10% metakaolin—which perform best in their incorporations—were compared to analyze the function of the three minerals. To establish the relationship between strength and mineral incorporation and curing time, three mathematical models, linear model, general nonlinear model, and data distribution shape nonlinear model (DDSNM), are commonly used for material property analysis based on statistics. DDSNM best describes the trend of strength change among the three models and the error is small for three minerals. Based on DDSNM, the influence of various minerals on the strength of MPC mortar was quantitatively evaluated by calculating the variable partial derivatives, and verified by scanning electron microscopy and X-ray diffraction. MK performs the best in improving the flexural strength performance of MPC, while SF performs the best in the compressive strength. FA-MPC has low sensitivity to dosage fluctuations and is easy to prepare.

Abstract Image

基于数学模型的不同矿物强度分析--改良型 MPC
该研究通过力学试验、数学模型分析和微结构表征,探讨了不同矿物掺量和固化时间对改性磷酸镁水泥(MPC)砂浆强度的影响。粉煤灰(FA)、硅灰(SF)和偏高岭土(MK)具有优异的耐久性和粘结性,被用于改性磷酸镁水泥砂浆。在改性 MPC 砂浆的强度与矿物掺入量和固化时间之间建立了定量关系。首先,评估了在空气中固化的每种矿物改性 MPC 砂浆在不同矿物掺量和固化时间下的强度。对含有 10% 粉煤灰、15% 硅灰和 10% 偏高岭土的 MPC 砂浆的强度进行了比较,以分析这三种矿物的作用。为了确定强度与矿物掺量和固化时间之间的关系,基于统计学的材料特性分析通常采用三种数学模型,即线性模型、一般非线性模型和数据分布形状非线性模型(DDSNM)。在这三种模型中,DDSNM 最能描述强度变化的趋势,而且对三种矿物来说误差很小。基于 DDSNM,通过计算变量偏导数定量评估了各种矿物对 MPC 砂浆强度的影响,并通过扫描电子显微镜和 X 射线衍射进行了验证。MK 在提高 MPC 抗折强度方面表现最佳,而 SF 在抗压强度方面表现最佳。FA-MPC 对剂量波动的敏感性低,且易于制备。
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来源期刊
International Journal of Concrete Structures and Materials
International Journal of Concrete Structures and Materials CONSTRUCTION & BUILDING TECHNOLOGY-ENGINEERING, CIVIL
CiteScore
6.30
自引率
5.90%
发文量
61
审稿时长
13 weeks
期刊介绍: The International Journal of Concrete Structures and Materials (IJCSM) provides a forum targeted for engineers and scientists around the globe to present and discuss various topics related to concrete, concrete structures and other applied materials incorporating cement cementitious binder, and polymer or fiber in conjunction with concrete. These forums give participants an opportunity to contribute their knowledge for the advancement of society. Topics include, but are not limited to, research results on Properties and performance of concrete and concrete structures Advanced and improved experimental techniques Latest modelling methods Possible improvement and enhancement of concrete properties Structural and microstructural characterization Concrete applications Fiber reinforced concrete technology Concrete waste management.
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