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<p>The use of stabilized earth blocks as a sustainable alternative to traditional bricks plays a key role in reducing pollution. Moreover, environmentally friendly earth block stabilizers can enhance compatibility with sustainable development. Although polymers have nowadays gained a prominent position in the construction industry, no comprehensive study has yet been reported on the utilization of environmentally friendly synthetic polymers as stabilizing agents for earth blocks. In this regard, the present study was conducted to investigate the performance of some earth blocks stabilized with two environmentally friendly emulsion copolymers. The blocks were intended to serve as paving blocks and bricks. To this end, the earth blocks were stabilized with two eco-friendly polymers at varying percentages (ranging from 2.5 to 30%) and then subjected to tests of compressive strength (BS EN 1338), water absorption by immersion (ASTM C140), capillary action (XP P 13–901), splitting tensile strength (BS EN 1338), slip resistance (BS EN 1338), floor covering freeze–thaw cycle (BS EN 1338), block resistance to acid (SNI 03–0691), flexural strength (ASTM C67), indirect tensile strength (ASTM C496), non-load-bearing block freeze–thaw cycle (ASTM C1262), wet-dry cycle (ASTM D559), and erosion (NZS 4298), as well as ultrasonic (ASTM C597) tests and SEM analyses. Microstructural analysis and statistical evaluation were also conducted. The results indicate that the type and amount of pure polymer significantly influence the performance and properties of earth blocks. The optimal type and quantity of polymer must be determined based on the intended application of blocks. For instance, in this study, compressive strength, as the most critical mechanical property, increased on average by up to six times with the addition of the polymer up to an optimal percentage, beyond which it decreased by half. Microstructural images further revealed that, with an optimal polymer content, the polymer particles fill the voids between the soil particles, form bridges, and bind the soil particles together, thereby enhancing the overall performance of the earth blocks.</p>

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Mechanical and chemical evaluation of an environmentally friendly copolymer for earth block stabilization in sustainable construction

  • 期刊论文

  • 发表日期：

    2026年7月27日

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  • Zohreh Ghafourifard,
  • Maryam Mokhtari,
  • Mohammad Mehdi Khabiri,
  • Seyyed Mehrdad Jalilian

摘要

The use of stabilized earth blocks as a sustainable alternative to traditional bricks plays a key role in reducing pollution. Moreover, environmentally friendly earth block stabilizers can enhance compatibility with sustainable development. Although polymers have nowadays gained a prominent position in the construction industry, no comprehensive study has yet been reported on the utilization of environmentally friendly synthetic polymers as stabilizing agents for earth blocks. In this regard, the present study was conducted to investigate the performance of some earth blocks stabilized with two environmentally friendly emulsion copolymers. The blocks were intended to serve as paving blocks and bricks. To this end, the earth blocks were stabilized with two eco-friendly polymers at varying percentages (ranging from 2.5 to 30%) and then subjected to tests of compressive strength (BS EN 1338), water absorption by immersion (ASTM C140), capillary action (XP P 13–901), splitting tensile strength (BS EN 1338), slip resistance (BS EN 1338), floor covering freeze–thaw cycle (BS EN 1338), block resistance to acid (SNI 03–0691), flexural strength (ASTM C67), indirect tensile strength (ASTM C496), non-load-bearing block freeze–thaw cycle (ASTM C1262), wet-dry cycle (ASTM D559), and erosion (NZS 4298), as well as ultrasonic (ASTM C597) tests and SEM analyses. Microstructural analysis and statistical evaluation were also conducted. The results indicate that the type and amount of pure polymer significantly influence the performance and properties of earth blocks. The optimal type and quantity of polymer must be determined based on the intended application of blocks. For instance, in this study, compressive strength, as the most critical mechanical property, increased on average by up to six times with the addition of the polymer up to an optimal percentage, beyond which it decreased by half. Microstructural images further revealed that, with an optimal polymer content, the polymer particles fill the voids between the soil particles, form bridges, and bind the soil particles together, thereby enhancing the overall performance of the earth blocks.