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Modified layered double hydroxide as well as preparation method and application thereof
The invention discloses a modified layered double hydroxide as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing Mg-Fe-CO3 type LDHs; calcining the Mg-Fe-CO3 type LDHs for 4-6 h, wherein the heating rate is 5-10 DEG C/min, the calcination temperature is 500-700 DEG C, so as to prepare the modified Mg-Fe-CO3 type LDHs. The modified Mg-Fe-CO3 type LDHs are added into the concrete as the admixture, the adsorption effect of the admixture on CO3<2-> is utilized, the carbonization depth of the concrete can be effectively reduced, loss of alkaline substances is avoided, and the admixture has a very good application prospect in the aspect of improving the carbonization resistance of the concrete.
本发明公开一种改性层状双氢氧化物及其制备方法与应用。该制备方法包括步骤：制备Mg‑Fe‑CO3型LDHs；将所述Mg‑Fe‑CO3型LDHs进行煅烧4～6h，升温速率为5～10℃/min，煅烧温度为500～700℃，制得改性Mg‑Fe‑CO3型LDHs。本发明将改性Mg‑Fe‑CO3型LDHs作为掺合料加入混凝土中，利用该掺合料对CO32‑的吸附效果，能有效地减少混凝土的碳化深度，避免了碱性物质的流失，在提升混凝土抗碳化性能方面具有很好的应用前景。
Modified layered double hydroxide as well as preparation method and application thereof
The invention discloses a modified layered double hydroxide as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing Mg-Fe-CO3 type LDHs; calcining the Mg-Fe-CO3 type LDHs for 4-6 h, wherein the heating rate is 5-10 DEG C/min, the calcination temperature is 500-700 DEG C, so as to prepare the modified Mg-Fe-CO3 type LDHs. The modified Mg-Fe-CO3 type LDHs are added into the concrete as the admixture, the adsorption effect of the admixture on CO3<2-> is utilized, the carbonization depth of the concrete can be effectively reduced, loss of alkaline substances is avoided, and the admixture has a very good application prospect in the aspect of improving the carbonization resistance of the concrete.
本发明公开一种改性层状双氢氧化物及其制备方法与应用。该制备方法包括步骤：制备Mg‑Fe‑CO3型LDHs；将所述Mg‑Fe‑CO3型LDHs进行煅烧4～6h，升温速率为5～10℃/min，煅烧温度为500～700℃，制得改性Mg‑Fe‑CO3型LDHs。本发明将改性Mg‑Fe‑CO3型LDHs作为掺合料加入混凝土中，利用该掺合料对CO32‑的吸附效果，能有效地减少混凝土的碳化深度，避免了碱性物质的流失，在提升混凝土抗碳化性能方面具有很好的应用前景。
Modified layered double hydroxide as well as preparation method and application thereof
一种改性层状双氢氧化物及其制备方法与应用
WANG JUNFENG (author) / FANG YUAN (author) / YIN XIAOHONG (author) / HE KEZE (author) / LIN CHEN (author) / LU LIULEI (author)
2021-09-17
Patent
Electronic Resource
Chinese
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