CONSTRUCTION AND BUILDING MATERIALS
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2025
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IF 8
Keheng Pan,Yinhan Cheng,Guangfei Qu,Zheng Yuan,Guojun Liu
As urbanization and industrialization continue to advance, the issue of solid waste generated by industrial production has become increasingly prominent, posing a serious threat to the natural environment. This study therefore proposes a basic design concept for 3D printing materials based on industrial solid waste, demonstrating its potential for practical applications. The study commences with an examination of the molding mechanism, followed by an investigation into the impact of retarder, thickener and solid waste on the performance of the paste. The relationship between retarding mechanisms, rheological properties and performance control is also explored. A printable geopolymer paste was prepared by combining industrial solid waste components with dopants, with a view to achieving varying coagulation times and rheological properties. The addition of 3 wt% retarder and 0.4 wt% thickener resulted in a paste that was utilized for printing molding. This paste exhibited a retention index of 2.1 %, a collapse ratio of 0.5 %, an initial setting time of 14 min, and a fluidity of 190 mm. The 14-day compressive and flexural strengths were found to be 65 MPa and 1.9 MPa, respectively. This study is of considerable theoretical and practical significance, and it plays a pivotal role in promoting the utilization of industrial solid waste resources and the advancement of green manufacturing technology.
研究领域:
材料科学
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土木工程
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环境科学
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增材制造
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工业废弃物利用
✓ 已验证
产品关联
DOI
高影响因子
Journal of Building Engineering
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2025
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IF 7.4
Wenxiu Qiao,Huina Li,Shuzhen Zheng,Hong Zhou,Yinwen Li,Shoufang Xu,Dengxue Ma,Jianfeng Ma
Inorganic nanomaterials are widely used in improving the mechanical strength of cement-based materials. However, when used in cement-based materials, inorganic nanomaterials are not only easy to agglomerate, but also often leads to the problem of significant decrease in flexural strength. In this paper, a novel organic-inorganic hybrid strategy is adopted by grafting α-lipoic acid, polyether amine, and nano-SiO 2 to synthesize a new type of polymeric nanohybrid material PTNS. The new PNTS exhibits multiple structural characteristics, including dynamic chemical S-S bonds, polycarboxylate frameworks, and steric hindrance effects derived from polyether amines. By adding PTNS to the cement paste, the agglomeration of nano-SiO 2 in cement-based materials can be effectively avoided. The mechanical strength test results show that polymeric nanohybrid material PTNS with dynamic chemical bond can achieve the synergistic improvement of the compressive strength and flexural strength of cement paste. The flexural strength of cement paste mixed with 2.0 wt‰ PTNS-2 increased by 5.3 %, 13.0 % and 9.3 % compared with the control sample after curing for 1, 7 and 28 days, respectively; The compressive strength increased by 18.6 %, 1.5 % and 6.2 % respectively. Furthermore, X-ray diffraction, scanning electron microscopy and cement hydration tests, which revealed the mechanism of mechanical properties enhancement of the slow-release polythioctic acid grafted nano-SiO 2 hybrid material PNTS.
研究领域:
材料科学
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土木工程
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纳米材料
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水泥水化
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聚合物杂化复合材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2023
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IF 5.7
Yage Li,Shuaibing Wu,Feng Liang,Gongye Lv,Yu Tian,Haijun Zhang,Yong Liu,Guoqi Liu
Rod-like h-BN with an average diameter of 2 µm was synthesized at a relatively low temperature of 1200 °C through a catalytic pyrolysis precursor strategy using boric acid and melamine as starting materials, and Co(SO 3 NH 2 ) 2 ·4 H 2 O as a catalyst precursor. Subsequently, novel low-carbon Al 2 O 3 -C refractories were prepared via a replacement of the graphite with the as-synthesized rod-like h-BN. When 1 wt% h-BN rods were added to replace graphite, after 3 h coking at 1400 °C, the cold modulus of rupture, cold compressive strength , oxidation resistance , and thermal shock resistance of the specimen were increased by 16.4%, 24.8%, 31.2%, and 52.2%, respectively, compared with these of the control specimen. Moreover, the introduction of h-BN rods in the matrix enhanced the non-wetting ability of the refractory with molten slag, thus the rod-like h-BN modified low carbon refractory presented better slag corrosion resistance with reference to the specimen without h-BN rods.
研究领域:
材料科学
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耐火材料
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高温性能
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）