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Crack-resistant heat-resistant functional aggregate, preparation method thereof and nuclear engineering concrete containing crack-resistant heat-resistant functional aggregate
The invention discloses an anti-crack heat-resistant functional aggregate, a preparation method thereof and nuclear engineering concrete containing the anti-crack heat-resistant functional aggregate, and belongs to the technical field of concrete. The method comprises the following steps: S1, uniformly mixing polyvinyl alcohol, absolute ethyl alcohol and hydroxyethyl cellulose, then adding magnesium oxide, and uniformly stirring to obtain slurry; then carrying out directional freezing and freeze drying to obtain a magnesium oxide porous framework; s2, uniformly stirring silicon nitride, an adhesive, a phase change material and a dispersing agent to obtain mixed slurry; s3, soaking the magnesium oxide porous framework in the mixed slurry, and freeze-drying to obtain the heat-resistant phase change microcapsule; s4, adding the heat-resistant phase change microcapsules and the aluminum sol into a solvent to obtain a suspension; and S5, fully soaking the coarse aggregate in the turbid liquid, drying, and calcining to obtain the product. The heat-resistant phase change microcapsules prepared from magnesium oxide and silicon nitride through a specific method are used for filling and coating pores of the aggregate, so that the heat resistance, mechanical strength and crack resistance of the concrete are improved.
本发明公开一种抗裂耐热功能骨料及其制备方法、包含其的核工程混凝土，属于混凝土技术领域。所述方法包括以下步骤：S1.将聚乙烯醇、无水乙醇和羟乙基纤维素混合均匀，再加入氧化镁，搅拌均匀后得到浆料；然后经定向冷冻、冷冻干燥后得到氧化镁多孔骨架；S2.将氮化硅、黏结剂、相变材料和分散剂搅拌均匀，得到混合浆料；S3.将氧化镁多孔骨架置于混合浆料中浸泡，经冷冻干燥得到耐热相变微胶囊；S4.将耐热相变微胶囊和铝溶胶加入溶剂中，得到悬浊液；S5.将粗骨料置于悬浊液中充分浸泡，干燥后煅烧，即得。本发明利用以氧化镁和氮化硅通过特定方法制备得到的耐热相变微胶囊对骨料进行孔隙填充和裹覆，提高混凝土的耐热性能、力学强度和抗裂性能。
Crack-resistant heat-resistant functional aggregate, preparation method thereof and nuclear engineering concrete containing crack-resistant heat-resistant functional aggregate
The invention discloses an anti-crack heat-resistant functional aggregate, a preparation method thereof and nuclear engineering concrete containing the anti-crack heat-resistant functional aggregate, and belongs to the technical field of concrete. The method comprises the following steps: S1, uniformly mixing polyvinyl alcohol, absolute ethyl alcohol and hydroxyethyl cellulose, then adding magnesium oxide, and uniformly stirring to obtain slurry; then carrying out directional freezing and freeze drying to obtain a magnesium oxide porous framework; s2, uniformly stirring silicon nitride, an adhesive, a phase change material and a dispersing agent to obtain mixed slurry; s3, soaking the magnesium oxide porous framework in the mixed slurry, and freeze-drying to obtain the heat-resistant phase change microcapsule; s4, adding the heat-resistant phase change microcapsules and the aluminum sol into a solvent to obtain a suspension; and S5, fully soaking the coarse aggregate in the turbid liquid, drying, and calcining to obtain the product. The heat-resistant phase change microcapsules prepared from magnesium oxide and silicon nitride through a specific method are used for filling and coating pores of the aggregate, so that the heat resistance, mechanical strength and crack resistance of the concrete are improved.
本发明公开一种抗裂耐热功能骨料及其制备方法、包含其的核工程混凝土，属于混凝土技术领域。所述方法包括以下步骤：S1.将聚乙烯醇、无水乙醇和羟乙基纤维素混合均匀，再加入氧化镁，搅拌均匀后得到浆料；然后经定向冷冻、冷冻干燥后得到氧化镁多孔骨架；S2.将氮化硅、黏结剂、相变材料和分散剂搅拌均匀，得到混合浆料；S3.将氧化镁多孔骨架置于混合浆料中浸泡，经冷冻干燥得到耐热相变微胶囊；S4.将耐热相变微胶囊和铝溶胶加入溶剂中，得到悬浊液；S5.将粗骨料置于悬浊液中充分浸泡，干燥后煅烧，即得。本发明利用以氧化镁和氮化硅通过特定方法制备得到的耐热相变微胶囊对骨料进行孔隙填充和裹覆，提高混凝土的耐热性能、力学强度和抗裂性能。
Crack-resistant heat-resistant functional aggregate, preparation method thereof and nuclear engineering concrete containing crack-resistant heat-resistant functional aggregate
一种抗裂耐热功能骨料及其制备方法、包含其的核工程混凝土
FANG BO (author) / WANG BAOSHU (author) / LI YUMIN (author) / LIU MIN (author) / JI XIANKUN (author) / HOU CHUNPING (author) / ZHU GUOJUN (author) / KONG QINGXUN (author) / TU BO (author)
2024-06-04
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
/
B01J
Chemische oder physikalische Verfahren, z.B. Katalyse oder Kolloidchemie
,
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
/
C09K
Materialien für Anwendungen, soweit nicht anderweitig vorgesehen
,
MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR
/
G21F
Schutz gegen Röntgenstrahlung, Gammastrahlung, Korpuskularstrahlung oder Teilchenbeschuss
,
PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT
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