首页|氧化石墨烯对天然水硬性石灰水化及力学性能的影响

氧化石墨烯对天然水硬性石灰水化及力学性能的影响

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  • 国家科技期刊平台
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石质文物是一类重要的文化遗产,然而裂隙会导致其产生失稳、渗水、风化等病害,因此,开发一种合适的灌浆材料用于石质文物裂隙修复具有重要意义.本文将氧化石墨烯(GO)掺入天然水硬性石灰(NHL2)制备灌浆材料,采用SEM、TG、XRD和FT-IR等测试研究了 GO掺量对NHL2水化进程及水化产物的影响,通过力学性能测试和模拟灌浆试验评价了该材料用于石质文物灌浆加固的可行性.结果表明:添加GO可加速NHL2的水化进程,促进规整致密的花状聚集态水化产物的形成;当GO掺量为0.05％(质量分数)时,试样的水化产物含量最多,力学性能最好,28 d抗压强度和抗折强度分别达2.83和1.63 MPa,相比空白试样分别提高了 19.91％和23.40％.此外,灌浆材料与砂岩之间具有优异的黏结强度,两者界面结合紧密,兼容性良好.本研究为石质文物的裂隙灌浆加固提供了参考.
Effect of Graphene Oxide on Hydration and Mchanical Properties of Natural Hydraulic Lime
The stone cultural relics are important cultural heritage,however,fissures can lead to destabilization,water seepage and weathering diseases.Therefore,it is of great significance to develop a suitable grouting material for repairing fissures in stone cultural relics.The grouting material was prepared by adding graphene oxide(GO)into natural hydraulic lime(NHL2).The influence of GO content on hydration process and products of NHL2 was studied using SEM,TG,XRD and FT-IR.The feasibility of this material for grouting reinforcement of stone cultural relics was evaluated by mechanical properties and simulated grouting tests.The results indicate that the addition of GO can accelerate hydration process and promote formation of regular and dense flower-like aggregated hydration products.When GO content is 0.05％(mass fraction),the sample has the highest content of hydration products and the best mechanical properties.The compressive strength and flexural strength of samples cured for 28 d can reach 2.83 and 1.63 MPa,which increases by 19.91％and 23.40％with the blank sample,respectively.Furthermore,there is excellent bonding strength between grouting material and sandstone,the interface of the two is closely combined with good compatibility.This work provides reference for grouting reinforcement of fissures in stone cultural relics.

natural hydraulic limegraphene oxidehydration productmicrostructurecompatibilitygrouting reinforcement

张彪、刘泓宇、齐南、王芬、朱建锋、李立、马涛、罗宏杰、施佩

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陕西科技大学材料科学与工程学院,文物保护科学与技术学院,地下文物保护材料与技术教育部重点实验室,西安 710021

陕西省文物保护研究院,砖石质文物保护国家文物局重点科研基地,西安 710075

上海大学文化遗产与信息管理学院,硅酸盐质文物保护教育部重点实验室,上海 200444

天然水硬性石灰 氧化石墨烯 水化产物 微观结构 兼容性 灌浆加固

国家自然科学基金国家自然科学基金国家自然科学基金中国博士后科学基金面上资助陕西省教育厅重点科研计划陕西省教育厅重点科研计划

5210210852102026522720202021M69199722JY00922JY010

2024

硅酸盐通报
中国硅酸盐学会 中材人工晶体研究院

硅酸盐通报

CSTPCD北大核心
影响因子：0.698
ISSN：1001-1625
年,卷(期)：2024.43(7)
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