Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Water-retaining admixture for concrete and preparation method of water-retaining admixture
The invention discloses a water-retaining admixture for concrete and a preparation method of the water-retaining admixture. The water-retaining admixture for concrete is prepared by mixing and stirring an adhesive, a polycarboxylic acid water reducer and water until the adhesive is completely dissolved, adding silicon dioxide gel and modified granular stone microspheres, and stirring, the adhesive is selected from any one or a mixture of two of xanthan gum and welan gum, and the modified granular stone microspheres comprise NTA and a mixture of granular stone powder and sodium type zeolite powder attached and wrapped outside. The polycarboxylate superplasticizer is used as a dispersing agent, the xanthan gum/welan gum solution is a shear thinning solution with pseudoplasticity and thixotropy, the shear thinning solution has pseudoplasticity when the shear thinning solution is static, and all the components are kept stable; meanwhile, silicon dioxide gel is added to improve the concrete flowability; through superposition of different systems, the water-retaining property of the slurry is improved, the bleeding rate is reduced, the workability is ensured, the segregation-resistant index is improved, the volume stability is improved, and the 28d compressive strength is improved.
本发明公开了一种混凝土用保水型外加剂及其制备方法。本发明所述混凝土用保水型外加剂由胶粘剂、聚羧酸减水剂、水混合搅拌至胶粘剂完全溶解后，加入二氧化硅凝胶和改性颗石微球搅拌获得；所述胶粘剂选自黄原胶、温轮胶中任意一种或两种混合，所述改性颗石微球包括NTA及外部附着包裹的颗石粉和钠型沸石粉混合物。本发明中以聚羧酸减水剂为分散剂，黄原胶/温轮胶溶液为具有假塑性和触变性的剪切稀化溶液，在静止时具有假塑性，使得各组分保持稳定；同时加入二氧化硅凝胶改善混凝土流动性；本发明通过不同体系的叠加，提高了浆体保水性，同时降低了泌水率，保证了和易性，提高了抗离析指数，提高了体积稳定性，提高了28d抗压强度。
Water-retaining admixture for concrete and preparation method of water-retaining admixture
The invention discloses a water-retaining admixture for concrete and a preparation method of the water-retaining admixture. The water-retaining admixture for concrete is prepared by mixing and stirring an adhesive, a polycarboxylic acid water reducer and water until the adhesive is completely dissolved, adding silicon dioxide gel and modified granular stone microspheres, and stirring, the adhesive is selected from any one or a mixture of two of xanthan gum and welan gum, and the modified granular stone microspheres comprise NTA and a mixture of granular stone powder and sodium type zeolite powder attached and wrapped outside. The polycarboxylate superplasticizer is used as a dispersing agent, the xanthan gum/welan gum solution is a shear thinning solution with pseudoplasticity and thixotropy, the shear thinning solution has pseudoplasticity when the shear thinning solution is static, and all the components are kept stable; meanwhile, silicon dioxide gel is added to improve the concrete flowability; through superposition of different systems, the water-retaining property of the slurry is improved, the bleeding rate is reduced, the workability is ensured, the segregation-resistant index is improved, the volume stability is improved, and the 28d compressive strength is improved.
本发明公开了一种混凝土用保水型外加剂及其制备方法。本发明所述混凝土用保水型外加剂由胶粘剂、聚羧酸减水剂、水混合搅拌至胶粘剂完全溶解后，加入二氧化硅凝胶和改性颗石微球搅拌获得；所述胶粘剂选自黄原胶、温轮胶中任意一种或两种混合，所述改性颗石微球包括NTA及外部附着包裹的颗石粉和钠型沸石粉混合物。本发明中以聚羧酸减水剂为分散剂，黄原胶/温轮胶溶液为具有假塑性和触变性的剪切稀化溶液，在静止时具有假塑性，使得各组分保持稳定；同时加入二氧化硅凝胶改善混凝土流动性；本发明通过不同体系的叠加，提高了浆体保水性，同时降低了泌水率，保证了和易性，提高了抗离析指数，提高了体积稳定性，提高了28d抗压强度。
Water-retaining admixture for concrete and preparation method of water-retaining admixture
一种混凝土用保水型外加剂及其制备方法
WANG LIJIANG (Autor:in) / WU TAO (Autor:in) / GUO PEIMIN (Autor:in) / HUANG DONGYUN (Autor:in) / SUN YANING (Autor:in) / NIU JUNJIE (Autor:in) / ZHANG LIZHUANG (Autor:in) / LI ZIWEI (Autor:in) / SHEN YUFA (Autor:in) / GUO RUIMIN (Autor:in)
18.10.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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