不同 Zr02 掺量改性水泥钙质砂无侧限抗压特性研究
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中图分类号：TU43 文献标志码：A 文章编号：1005-8249（2025）03-0013-06
DOI：10.19860/j.cnki.issn1005- 8249.2025.03.003
Abstract： To investigate the influence of nano zirconium dioxide （ ZrO2 ）dosage on the mechanical performance of cement - stabilized calcareous sand，prepared specimens of calcareous sand modified with varying proportions of nano Zr02 and evaluated their behavior using unconfined compresive strength tests.Theresults show thatthe stress-strain curves ofthenano ZrO2- cementcalcareoussand exhibitasoftening，hump－shapedprofile，withresidual stressesultimatelystabilizingataconstant level.Incorporation of nano ZrO2 led to increases in unconfined compressive strength of 101.1% ， 105.6% ，and 91.6% at curing ages of 7，14 and 28d ，respectively. Moreover， the compressive strength of the nano ZrO2 - cement calcareous sand demonstrated greater sensitivity to curing age compared to plain cement calcareous sand.The adition of nano Zr02 also significantly enhancedthedeformationmodulusofthespecimens，improvingtheirresistancetodeformation．Thesefindings provide valuable technical guidance forthe application of modified calcareous sand in islandand ref construction projects.
Key words： calcareous sand; nano ZrO2 ；cement； stress deviation coefficient method；mechanical properties
0 引言
我国南海地区广泛分布着钙质砂，它是一种富含碳酸钙等难溶性碳酸盐类矿物，其形成过程复杂，主要是由生物体的碎屑与骨架所构成。（剩余6278字）
