检索结果-南通市图书馆

Development and Field Application of Phosphogypsum-Based Soil Subgrade Stabilizers

在线全文

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2022年第8期10卷 2247-2261页

作者： Hongfei Yue Aiguo Fang sudong hua Zenghuan Gu Yu Jia Cheng Yang College of Materials Science and Engineering Nanjing Tech UniversityNanjing211800China China Construction Installaction Engineering Co. Ltd.Nanjing210023China Jiangsu Subote New Material Co. Ltd.Nanjing211103China Sinoma Construction Co. Ltd.Suzhou215300China

A phosphogypsum-based subgrade stabilizer(PBSS)was formulated using industrial by-product phosphogypsum(PG),mixed with slag and calcium-silicon-rich active material(GSR).The active powder(AP)was used to modify PBSS,and PBSS-AP was *** and PBSS-AP were each mixed with 10%silty soil,and cement and lime(CAL:5%lime+2%cement)were used as the traditional material for comparative *** were cured under standard conditions,and tested for unconfined compressive strength(UCS),water stability,volume expansion,and leachate,to explore the stabilization effect of the three solidified materials on silty *** results showed that the comprehensive performance of sility soil mixed with 12%PBSS-AP was the *** CaO,SiO_(2)and Al_(2)O_(3)provided by PG,Slag and GSR will react with water to form a stable C-S-H gel,which is conducive to stabilizing the *** application results showed that the compaction exceeded 95%,the deflection was 144.9 mm,and UCS was 2.5 MPa after 28 *** findings indicated that PBSS-AP is an effective stabilizer for subgrade soils.

关键词： Phosphogypsum solidified material unconfined compressive strength water stability volume expansion leachate

Development of Steel Slag-Based Solidification/Stabilization Materials for High Moisture Content Soil

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2022年第3期10卷 735-749页

作者： Yu Jia sudong hua Liying Qian Xiaojian Ren Jie Zuo Yanfang Zhang College of Materials Science and Engineering Nanjing Tech UniversityNanjing210009China Jangsu Yonggang Group Co. Ltd.Suzhou215628China China Construction Installaction Engineering Co. Ltd.Nanjing210023China

To solve the problems of high moisture content,high viscosity,and poor engineering mechanical properties of soil,this paper using with steel slag(SS)and desulfurization ash(DS)as initial raw materials,realizing the coop-erative treatment of solid waste and solidification of silt *** synergistic utilization of SS and DS can reduce the production cost of curing agent and promote its own *** to blended cement of various SS contents and inspected compressive strength performances,the most suitable raw materials ratio was *** best formula for this curing agent is cement:steel slag=3:7 with 5%DS,and its 28-day compressive strength can reach 30 *** experiment shows that the effect of DS and Na_(2)SO_(4) reagent with the same quality on early compressive strength improvement of cement and SS system is not much *** this study,the mineral composition and microstructure of different gel system blocks were characterized by XRD,SEM and EDX,and a large number of webbed structures were found in the SEM test,which was not seen in previous ***,unconfined compressive strength(UCS),water resistance,and toxic characteristic leaching procedure(TCLP)were used to evaluate silt solidified soil *** results demonstrated that the solidified silt could meet not only the standard of general subgrade;but also has a partial stabilization effect of heavy metal ions.

关键词： Steel slag desulfurization ash high moisture content soil synergistic effect strength stabilized soil

Development and Application of a High-Volume Recycled Powder Solidifying Material for Waterworks Sludge

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2022年第4期10卷 939-953页

作者： Xiang Deng sudong hua Fan Xia Yanfang Zhang Dapeng Guo Xinxing Zhu Defei Zhu College of Materials Science and Engineering Nanjing Tech UniversityNanjing211816China China Construction Installation Group Nanjing Construction Co. Ltd.Nanjing210023China Nanjing Pukou Urban and Rural Construction Group Co. Ltd.Nanjing211800China

Recycled powder(RP)is produced as a by-product during the process of recycling construction and demolition(C&D)wastes,presenting a low additional *** RP-based solidifying material can not only improve its utilization efficiency,but also reduce the cost of commercial solidifying *** date,this is the best solidifying material utilized to dispose the original waterworks sludge(OWS)with high moisture contents(60%),and the product could be used to fabricate non-fired *** has become a new environment-friendly technology of“using waste to treat waste”.In this paper,the influence of different particle sizes and dosages of RP on the prepared solidifying material was ***,unconfined compression strength(UCS),volume stability,chemical composition,and heat of hydration,pore structure of the solidifying material were ***,non-fired bricks were prepared by using the solidifying material,recycled aggregate,and original waterworks *** UCS and softing coefficient(SC)of the non-fired bricks were *** a result,the 28-day UCS of the solidifying material with optimal(M30)was 35.40 MPa,which could reach 84.37%of Portland cement(PC).The addition of RP increased the volume stability of the solidifying *** addition of a large amount of RP reduced the heat flux and cumulative heat release of the solidifying material,while its porosity *** UCS of non-fired brick(NF20)in 28 days was 15.19 MPa and the SC after 28 days was 78.35%.In conclusion,the preparation of solidifying material using RP could be a promising approach and has a great potential in disposal of original waterworks sludge.

关键词： Recycled powder solidifying material original waterworks sludge non-fired brick unconfined compressive strength

Development of a Soil Stabilizer for Road Subgrade Based on Original Phosphogypsum

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2021年第2期9卷 253-268页

作者： Zenghuan Gu Aiguo Fang sudong hua Qingzhou Zhao Lidong Sun Fan Xia Liying Qian Xiaojian Ren College of Materials Science and Engineering Nanjing Tech UniversityNanjing210009China China Construction Installation Engineering Co. Ltd.Nanjing210023China Jiangsu YongGang Group Co. Ltd.Suzhou215628China

The research used industrial by-products original phosphogypsum(PG)as the main raw material,slag(SG)and Portland cement(PC)as auxiliary materials,and the optimal additive amount was determined according to the compressive strength value of the *** evaluate the water resistance and volume stability of the samples,and determine the best formula for new roadbed stabilized *** results showed that when the weight ratio of PG,slag and cement was OPG:SG:PC=6:3:1,and mixed with 5%micro silica fume(MSF)and 3‰hydroxypropyl methyl cellulose(HPMC),the sample’s comprehensive performance was the best,specifically,the sample’s compressive strength in 60 days reached 28.8 MPa,the softening coefficient reached 0.9,and the expansion rate was stable at about−0.2%.In addition,the mechanism of action of enhancers MSF and HPMC was analyzed according to use Vicat device,X-ray diffractometer and scanning electron *** best formula SP3GH3 has the best curing effect on *** 28-day unconfined compressive strength(UCS)of the sample reached 2.4 MPa,the expansion rate was less than 0.09%,and the water stability coefficient was above 0.79,which was higher than that of the samples cured by traditional cement and lime during the same period.

关键词： Original phosphogypsum subgrade stabilized material compressive strength softening coefficient expansion rate

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

高韧性油井固井材料的性能与应用(英文)

硅酸盐学报 2007年第6期35卷 786-790页

作者：华苏东姚晓南京工业大学材料科学与工程学院南京210009

针对射孔和增产措施使油井水泥环产生脆性破坏,带来层间流体窜流和套损率上升等难题,开发了一种新型增韧剂HD[合成橡胶粉H的质量分数(下同)w=5.5%;特种化纤D的w=0.2%]。评价了掺HD水泥石的力学性能和微观结构及水泥浆的工程性能。结果表... 详细信息

针对射孔和增产措施使油井水泥环产生脆性破坏,带来层间流体窜流和套损率上升等难题,开发了一种新型增韧剂HD[合成橡胶粉H的质量分数(下同)w=5.5%;特种化纤D的w=0.2%]。评价了掺HD水泥石的力学性能和微观结构及水泥浆的工程性能。结果表明:掺HD油井水泥石的韧性和弹性均被显著提高,抗冲击功提高了198%～222%,Young模量降低了38%～40%;掺HD(w=5.7%),减阻剂USZ(w=0.2%),降滤失剂F17B(w=1.2%)和晶体膨胀剂F17A(w=3%)水泥浆综合性能满足固井施工的基本要求。对不同水泥环中应力波传播速率的计算和模拟射孔实验表明:水泥石弹性模量的降低有利于韧性的提高。

关键词：油井水泥韧性抗冲击功纤维掺量固井

用BP神经网络优化油井水泥纤维增韧剂的组成

在线全文

学校读者我要写书评

暂无评论

天然气工业 2005年第7期25卷 72-74页

作者：华苏东姚晓南京工业大学材料科学与工程学院

掺有混杂短纤维的油井水泥增韧剂能够明显改善油井水泥石固有的脆性,大幅度地提高水泥环的韧性。文章通过BP神经网络对实验数据进行学习预测,优化了混杂短纤维在油井水泥增韧剂中的组成,提高了选材的准确性,为纤维增韧剂的选择和应用提... 详细信息

掺有混杂短纤维的油井水泥增韧剂能够明显改善油井水泥石固有的脆性,大幅度地提高水泥环的韧性。文章通过BP神经网络对实验数据进行学习预测,优化了混杂短纤维在油井水泥增韧剂中的组成,提高了选材的准确性,为纤维增韧剂的选择和应用提供了一定的理论依据。通过与回归分析方法进行比较,证明了神经网络预测更准确。

关键词：油井水泥增韧剂神经网络优化组成 BP神经网络回归分析方法神经网络预测实验数据短纤维水泥石水泥环大幅度准确性混杂

在线全文

学校读者我要写书评

暂无评论

纤维补强增韧固化土的试验研究

非金属矿 2012年第6期35卷 6-8页

作者：王亚军华苏东姚晓南京工业大学材料科学与工程学院江苏南京210009

在土壤固化剂固化土中加入聚丙烯纤维改善固化土的力学性能,考察了试件养护龄期、聚丙烯纤维以及固化剂掺量对固化土无侧限抗压强度和受压过程的影响。结果表明,聚丙烯纤维可有效提高固化土的无侧限抗压强度,掺量为0.1%时纤维固化土的... 详细信息

在土壤固化剂固化土中加入聚丙烯纤维改善固化土的力学性能,考察了试件养护龄期、聚丙烯纤维以及固化剂掺量对固化土无侧限抗压强度和受压过程的影响。结果表明,聚丙烯纤维可有效提高固化土的无侧限抗压强度,掺量为0.1%时纤维固化土的无侧限抗压强度较同龄期未掺时提高了9.4%;随着龄期增长和固化剂掺量增加,抗压强度不断增加;聚丙烯纤维的掺入可有效提高固化土的韧性。

关键词：聚丙烯纤维固化土抗压强度脆性破坏

在线全文

学校读者我要写书评

暂无评论

废渣基土壤固化剂与不同土质的适应性研究

新型建筑材料 2016年第8期43卷 77-80,91页

作者：孟建伟华苏东姚晓南京工业大学材料科学与工程学院江苏南京210009

试验采用自主研制的工业废渣基土壤固化剂PS,与水泥-石灰无机固化剂分别对不同地区的黏性土、盐碱土、砂质土、粉质土等4种代表性土壤进行了固化试验。考察了固化土的无侧限抗压强度、水稳性能、抗冻性能。结果表明:PS固化土的各项性能... 详细信息

试验采用自主研制的工业废渣基土壤固化剂PS,与水泥-石灰无机固化剂分别对不同地区的黏性土、盐碱土、砂质土、粉质土等4种代表性土壤进行了固化试验。考察了固化土的无侧限抗压强度、水稳性能、抗冻性能。结果表明:PS固化土的各项性能都明显优于水泥-石灰稳定土,固化黏性土的28 d抗压强度高达4.3 MPa;对于盐碱土和砂质土的水冻稳定性改善效果更为优异,对各种土壤具有广泛的适应性。采用XRD和SEM对PS固化土试样进行表征,结果表明,PS固化剂与土壤反应生成的水化硅酸钙、钙矾石的等结晶状产物填充了空隙,起到稳定土壤的作用。

关键词：土壤固化剂无侧限抗压强度土质适应性

在线全文

学校读者我要写书评

暂无评论

煅烧制度对偏高岭土胶凝活性的影响

非金属矿 2007年第3期30卷 6-8页

作者：诸华军姚晓华苏东王道正南京工业大学材料科学与工程学院江苏南京210009

高岭土经适当温度煅烧后,具有较高火山灰活性,经碱激发可制得较高强度的地聚物。实验结果表明,高岭土经900℃煅烧6h后,反应活性最高,在高液固比(1.14)下经碱激发后生成的地聚物抗压强度最高,80℃下养护3d和7d抗压强度分别达到28.4和31.8... 详细信息

高岭土经适当温度煅烧后,具有较高火山灰活性,经碱激发可制得较高强度的地聚物。实验结果表明,高岭土经900℃煅烧6h后,反应活性最高,在高液固比(1.14)下经碱激发后生成的地聚物抗压强度最高,80℃下养护3d和7d抗压强度分别达到28.4和31.8MPa。对原料和煅烧产物的分析结果证实,高岭土煅烧后生成了高活性的偏高岭土,其晶体结构由晶态转变为非晶态,Al的配位数由6配位转变为以5配位为主。

关键词：地聚物碱激发高岭土偏高岭土抗压强度