Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention relates to cellulose modified water purification type pervious concrete and a preparation method thereof, and the cellulose modified water purification type pervious concrete is obtained by microcrystalline cellulose modification, taking diabase as aggregate, mixing with cement, fly ash, modified microcrystalline cellulose and water, molding and demolding. According to the invention, the modified microcrystalline cellulose and the fly ash form a synergistic effect, so that the cohesiveness and the water-retaining property of cement paste of the pervious concrete are improved, the phenomenon of blocking holes by flowing slurry can be inhibited, and the performance of a pervious concrete skeleton and a slurry structure is stable. The compressive strength and the breaking strength of the pervious concrete are improved, and the phenomenon that holes are blocked by flowing slurry is reduced, so that the pervious rate of the pervious concrete is increased. The purification capacity of the pervious concrete is further improved through the modified microcrystalline cellulose, and adsorption of Cu (II), Cr (III), Zn (II) and Pb (II) ions in water is achieved through cooperation of C-S-H gel and modified microcrystalline cellulose ligands in modified pervious concrete cement paste. The modified microcrystalline cellulose slows the early hydration process of the cement slurry, and is beneficial to reducing the generation of early surface cracks of the pervious concrete slurry.
本发明涉及一种纤维素改性净水型透水混凝土及制备方法，包括：微晶纤维素改性，以辉绿岩为骨料、与水泥、粉煤灰、改性微晶纤维素和水拌合、成型、脱模，即得。本发明中，改性微晶纤维素与粉煤灰形成协同作用，透水混凝土的水泥浆体粘聚性和保水性得到提高，可抑制淌浆堵孔现象出现，透水混凝土骨架和浆体结构性能稳定。透水混凝土抗压、抗折强度增大，且因流浆堵孔现象减少，透水混凝土透水率增大。改性微晶纤维素使透水混凝土的净化能力进一步提升，改性透水混凝土水泥浆体中C‑S‑H凝胶以及改性微晶纤维素配位体协同实现对水中Cu(Ⅱ)、Cr(Ⅲ)、Zn(Ⅱ)、Pb(Ⅱ)离子的吸附。改性微晶纤维素使水泥浆体早期水化进程变缓，有利于减少透水混凝土浆体早期表面裂缝的产生。
The invention relates to cellulose modified water purification type pervious concrete and a preparation method thereof, and the cellulose modified water purification type pervious concrete is obtained by microcrystalline cellulose modification, taking diabase as aggregate, mixing with cement, fly ash, modified microcrystalline cellulose and water, molding and demolding. According to the invention, the modified microcrystalline cellulose and the fly ash form a synergistic effect, so that the cohesiveness and the water-retaining property of cement paste of the pervious concrete are improved, the phenomenon of blocking holes by flowing slurry can be inhibited, and the performance of a pervious concrete skeleton and a slurry structure is stable. The compressive strength and the breaking strength of the pervious concrete are improved, and the phenomenon that holes are blocked by flowing slurry is reduced, so that the pervious rate of the pervious concrete is increased. The purification capacity of the pervious concrete is further improved through the modified microcrystalline cellulose, and adsorption of Cu (II), Cr (III), Zn (II) and Pb (II) ions in water is achieved through cooperation of C-S-H gel and modified microcrystalline cellulose ligands in modified pervious concrete cement paste. The modified microcrystalline cellulose slows the early hydration process of the cement slurry, and is beneficial to reducing the generation of early surface cracks of the pervious concrete slurry.
本发明涉及一种纤维素改性净水型透水混凝土及制备方法，包括：微晶纤维素改性，以辉绿岩为骨料、与水泥、粉煤灰、改性微晶纤维素和水拌合、成型、脱模，即得。本发明中，改性微晶纤维素与粉煤灰形成协同作用，透水混凝土的水泥浆体粘聚性和保水性得到提高，可抑制淌浆堵孔现象出现，透水混凝土骨架和浆体结构性能稳定。透水混凝土抗压、抗折强度增大，且因流浆堵孔现象减少，透水混凝土透水率增大。改性微晶纤维素使透水混凝土的净化能力进一步提升，改性透水混凝土水泥浆体中C‑S‑H凝胶以及改性微晶纤维素配位体协同实现对水中Cu(Ⅱ)、Cr(Ⅲ)、Zn(Ⅱ)、Pb(Ⅱ)离子的吸附。改性微晶纤维素使水泥浆体早期水化进程变缓，有利于减少透水混凝土浆体早期表面裂缝的产生。
Cellulose modified water purification type pervious concrete and preparation method thereof
一种纤维素改性净水型透水混凝土及制备方法
08.09.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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