岩土力学
巖土力學
암토역학
ROCK AND SOIL MECHANICS
2013年
z2期
150-155
,共6页
膨胀土%红黏土%石灰改良%最佳含水率%结构屈服强度%矿物成分
膨脹土%紅黏土%石灰改良%最佳含水率%結構屈服彊度%礦物成分
팽창토%홍점토%석회개량%최가함수솔%결구굴복강도%광물성분
expansive soil%red clay%lime-treated%optimum moisture content%structural yield strength%mineral composition
为探讨石灰改性膨胀土与红黏土的强度发展规律，以生石灰与消石灰改性的南阳膨胀土与郴州红黏土为研究对象，进行了无侧限抗压、固结快速直剪和固结压缩试验的对比研究。研究发现：在1a养生龄期内，石灰改性的南阳膨胀土与郴州红黏土无侧限抗压强度与养生龄期的对数基本呈线性关系；按大于最佳含水率3%制样的强度在养生28 d以后高于按最佳含水率制样；生石灰改性效果比消石灰改性效果好，由于矿物成分不同，石灰改性南阳膨胀土的效果比石灰改性郴州红黏土好。
為探討石灰改性膨脹土與紅黏土的彊度髮展規律，以生石灰與消石灰改性的南暘膨脹土與郴州紅黏土為研究對象，進行瞭無側限抗壓、固結快速直剪和固結壓縮試驗的對比研究。研究髮現：在1a養生齡期內，石灰改性的南暘膨脹土與郴州紅黏土無側限抗壓彊度與養生齡期的對數基本呈線性關繫；按大于最佳含水率3%製樣的彊度在養生28 d以後高于按最佳含水率製樣；生石灰改性效果比消石灰改性效果好，由于礦物成分不同，石灰改性南暘膨脹土的效果比石灰改性郴州紅黏土好。
위탐토석회개성팽창토여홍점토적강도발전규률，이생석회여소석회개성적남양팽창토여침주홍점토위연구대상，진행료무측한항압、고결쾌속직전화고결압축시험적대비연구。연구발현：재1a양생령기내，석회개성적남양팽창토여침주홍점토무측한항압강도여양생령기적대수기본정선성관계；안대우최가함수솔3%제양적강도재양생28 d이후고우안최가함수솔제양；생석회개성효과비소석회개성효과호，유우광물성분불동，석회개성남양팽창토적효과비석회개성침주홍점토호。
To explore the development law of the strength of lime-treated expansive soil and red clay, the unconfined compression, consolidated quick direct shear tests and consolidation test are carried out to compare the Nanyang expansive soil and Chenzhou red clay modified by quicklime and hydrated lime respectively. The study found that during the one-year curing period of lime-treated Nanyang expansive soil and Chenzhou red clay, the unconfined compression strength is linear with the logarithm of curing age. The strength of the samples with moisture content larger than optimum moisture content for 3%after 28 days curing is higher than that of the optimum moisture content samples. In addition, the modification effect of quicklime is better than the effect of hydrated lime. Due to the different mineral composition, the modification effect of lime-treated Nanyang expansive soil is better than that of Chenzhou red clay.
