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Effect of silica fume and glass powder for enhanced impact resistance in GGBFS-based ultra high-performance geopolymer fibrous concrete:An experimental and statistical analysis
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作者 G.Murali Anoop Kallamalayil Nassar +2 位作者 Madhumitha Swaminathan Parthiban Kathirvel Leong Sing Wong 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2024年第11期59-81,共23页
Solid waste recycling is an economically sound strategy for preserving the environment,safeguarding natural resources,and diminishing the reliance on raw material consumption.Geopolymer technology offers a significant... Solid waste recycling is an economically sound strategy for preserving the environment,safeguarding natural resources,and diminishing the reliance on raw material consumption.Geopolymer technology offers a significant advantage by enabling the reuse and recycling of diverse materials.This research assesses how including silica fume and glass powder enhances the impact resistance of ultra-high-performance geopolymer concrete(UHPGC).In total,18 distinct mixtures were formulated by substituting ground granulated blast furnace slag with varying proportions of silica fume and glass powder,ranging from 10%to 40%.Similarly,for each of the mixtures above,steel fibre was added at a dosage of 1.5%to address the inherent brittleness of UHPGC.The mixtures were activated by combining sodium hydroxide and sodium silicate solution to generate geopolymer binders.The specimens were subjected to drop-weight impact testing,wherein an examination was carried out to evaluate various parameters,including flowability,density at fresh and hardened state,compressive strength,impact numbers indicative of cracking and failure occurrences,ductility index,and analysis of failure modes.Additionally,the variations in the impact test outcomes were analyzed using the Weibull distribution,and the findings corresponding to survival probability were offered.Furthermore,the microstructure of UHPGC was scrutinized through scanning electron microscopy.Findings reveal that the specimens incorporating glass powder exhibited lower cracking impact number values than those utilizing silica fume,with reductions ranging from 18.63%to 34.31%.Similarly,failure impact number values decreased from 8.26%to 28.46%across glass powder contents.The maximum compressive and impact strength was recorded in UHPGC,comprising 10%silica fume with fibres. 展开更多
关键词 Silica fume Glass powder Impact strength Steel fibre ggbfs Weibull analysis Microstructure
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The Effect of Elevated Temperature on Bond Performance of Alkali-activated GGBFS Paste 被引量:2
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作者 郑文忠 朱晶 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2013年第4期721-725,共5页
The main reaction products were investigated by analysis of microstructure of alkali-activated ground granulated blast furnace slag (GGBFS) paste. An experimental research was performed on bond performance of alkali... The main reaction products were investigated by analysis of microstructure of alkali-activated ground granulated blast furnace slag (GGBFS) paste. An experimental research was performed on bond performance of alkali-activated GGBFS paste as a construction adhesive after exposure to 20-500℃. Through XRD analysis, a few calcium silicate hydrate, hydrotalcite and tetracalcium aluminate hydrate were determined as end products, and they were filled and packed each other at room temperature. In addition, akermanite dramatically increased at 800 ~C and above. The two key parameters, the ultimate load Pu.T and effective bond length Le, were determined using test data of carbon fiber-reinforced polymer (CFRP)-to-concrete bonded joints at elevated temperature. The experimental results indicate that the ultimate load Pu.T remains relatively stable initially and then decreases with increasing temperature. The effective bond length Le increases with increasing temperature except at 300℃. The proposed temperature-dependent effective bond length formula is shown to closely represent the test data. 展开更多
关键词 alkali-activated ggbfs paste MICROSTRUCTURE BOND effective bond length elevatedtemperature
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Effects of Al_2O_3 nanoparticles on properties of self compacting concrete with ground granulated blast furnace slag (GGBFS) as binder 被引量:9
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作者 Ali NAZARI Shadi RIAHI 《Science China(Technological Sciences)》 SCIE EI CAS 2011年第9期2327-2338,共12页
In this work, strength assessments and percentage of water absorption of self compacting concrete containing ground granulated blast furnace slag (GGBFS) and A1203 nanoparticles as binder have been investigated. Por... In this work, strength assessments and percentage of water absorption of self compacting concrete containing ground granulated blast furnace slag (GGBFS) and A1203 nanoparticles as binder have been investigated. Portland cement was replaced by different amounts of GGBFS and the properties of concrete specimens were investigated. Although it negatively impacts the physical and mechanical properties of concrete at early ages of curing, GGBFS was found to improve the physical and mechanical properties of concrete up to 45 wt% at later ages. A1203 nanoparticles with the average particle size of 15 nm were added partially to concrete with the optimum content of GGBFS and physical and mechanical properties of the specimens were measured. A1203 nanoparticle as a partial replacement of cement up to 3.0 wt% could accelerate C-S-H gel formation as a result of increased crystalline Ca(OH)2 amount at the early ages and hence increase strength and improve the resistance to water permeability of concrete specimens. The increase of the A1203 nanoparticles' content by more than 3.0 wt% would cause the reduction of the strength because of the decreased crystalline Ca(OH)2 content required for C-S-H gel formation. Several empirical relationships have been presented to predict flexural and split tensile strength of the specimens by means of the corresponding compressive strength at a certain age of curing. Accelerated peak appearance in conduction calorimetry tests, more weight loss in thermogravimetric analysis and more rapid appearance of the peaks related to hydrated products in X-ray diffraction results, all indicate that A1203 nanoparticles could improve mechanical and physical properties of the concrete specimens. 展开更多
关键词 CONCRETE ground granulated blast furnace slag ggbfs Al203 nanoparticles compressive strength flexural and splittensile strength pore structure thermogravimetric analysis conduction calorimetry
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Effect of ground granulated blast-furnace slag(GGBFS) and silica fume(SF) on chloride migration through concrete subjected to repeated loading 被引量:3
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作者 ZHANG WuMan BA HengJing 《Science China(Technological Sciences)》 SCIE EI CAS 2012年第11期3102-3108,共7页
The effect of ground granulated blast-furnace slag(GGBFS) and silica fume(SF) on the chloride migration through concrete subjected to repeated loading was examined.Portland cement was replaced by 20%,30%,40% GGBFS and... The effect of ground granulated blast-furnace slag(GGBFS) and silica fume(SF) on the chloride migration through concrete subjected to repeated loading was examined.Portland cement was replaced by 20%,30%,40% GGBFS and 5%,10% SF,respectively.Five times repeated loadings were applied to specimens,the maximum loadings were 40% and 80% of the axial cylinder compressive strength(f′c),respectively.Chloride migration through concretes was evaluated using the rapid chloride migration test and the chloride concentration in the anode chamber was measured.The results indicate that the transport number of chloride through concrete containing 20% and 30% GGBFS replacements and 5% and 10% SF replacements is lower than that of the control concrete,but 40% GGBFS replacement increases the transport number of chloride.Five loadings at 40% f′cor 80% f′c increase the transport number of chloride for all mixes investigated in this study.5% SF replacement has a very close effect on the chloride permeability of concrete with 20% GGBFS when concrete is subjected to 40% f′cor 80% f′c. 展开更多
关键词 CONCRETE ground granulated blast-furnace slag ggbfs silica fume (SF) chloride migration repeated loading
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矿渣聚丙烯纤维混凝土抗弯疲劳性能 被引量:10
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作者 张慧莉 田堪良 《浙江大学学报(工学版)》 EI CAS CSCD 北大核心 2011年第4期699-707,共9页
为了研究聚丙烯纤维和磨细粒化高炉矿渣(GGBFS)在不同应力水平和频率下对混凝土抗弯疲劳性能的影响,将4个配比的聚丙烯纤维和5个配比的矿渣分别掺入混凝土中,当应力水平为0.49、0.59、0.69,频率为20Hz时以及应力水平为0.59,频率为30、40... 为了研究聚丙烯纤维和磨细粒化高炉矿渣(GGBFS)在不同应力水平和频率下对混凝土抗弯疲劳性能的影响,将4个配比的聚丙烯纤维和5个配比的矿渣分别掺入混凝土中,当应力水平为0.49、0.59、0.69,频率为20Hz时以及应力水平为0.59,频率为30、40、50、60Hz时测试抗弯疲劳极限强度和疲劳寿命.研究表明:累积抗弯疲劳强度能够更准确地评价混凝土抗弯疲劳性能;聚丙烯纤维可以提高混凝土累积抗弯疲劳强度和抗疲劳寿命;矿渣及其水化物使得混凝土结构密实,改善了界面过渡区(ITZ)的结构,可以提高混凝土抗弯疲劳性能;抗弯疲劳性能随着应力水平提高而下降,S-N数学模型可以用于预测20Hz频率动疲劳荷载下的矿渣聚丙烯纤维混凝土工程寿命;在一定的应力水平下,测试频率越高,抗弯疲劳性能越差,f-N数学模型可以用于预测变频率动疲劳荷载下的矿渣聚丙烯纤维混凝土工程寿命. 展开更多
关键词 抗弯疲劳极限 疲劳寿命模型 聚丙烯纤维 磨细粒化高炉矿渣(ggbfs) 扫描电子显微镜(SEM) 应力水平
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Optimization of Blended Mortars Using Steel Slag Sand 被引量:1
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作者 陈美祝 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2007年第4期741-744,共4页
A new kind of mortar made of ground granulated blast-furnace slag (GGBFS), gypsum, clinker and steel slag sand (〈4.75 mm) was developed. The ratio of steel slag sand to GGBFS was 1 : 1 and the amount of gypsum w... A new kind of mortar made of ground granulated blast-furnace slag (GGBFS), gypsum, clinker and steel slag sand (〈4.75 mm) was developed. The ratio of steel slag sand to GGBFS was 1 : 1 and the amount of gypsum was 4% by weight while the dosage of clinker ranged from 0% to 24%. The optimization formulation of such mortar was studied. The content of steel slag sand should be less than 50% according to the volume stability of blended mortar, and the dosage of clinker is about 10% based on the strength development. Besides strength, the hydration heat, pore structure and micro pattern of blended mortar were also determined. The experimental results show the application of steel slag sand may reduce the dosage of cement clinker and increase the content of industrial waste product such as GGBFS, and the clinker is also a better admixture for blended mortar using steel slag sand. 展开更多
关键词 steel slag sand cement clinker ggbfs GYPSUM blended mortar
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Properties and Mechanism on Flexural Fatigue of Polypropylene Fiber Reinforced Concrete Containing Slag 被引量:2
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作者 张慧莉 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2011年第3期533-540,共8页
Properties and mechanism were investigated on flexural fatigue of concrete containing polypropylene fibers and ground granulated blast furnace slag(GGBFS).Four polypropylene fibers’volume fractions and five slag pr... Properties and mechanism were investigated on flexural fatigue of concrete containing polypropylene fibers and ground granulated blast furnace slag(GGBFS).Four polypropylene fibers’volume fractions and five slag proportions were considered.An experiment was conducted to obtain the fatigue lives at three stress levels in 20 Hz frequency and at a constant stress level of 0.59 in four frequency respectively.Mechanism and evaluation were investigated based on the experimental data.Fatigue life span models were established.The results show that the addition of polypropylene fibers improves the flexural fatigue cumulative strength and fatigue life span.It is proposed that the slag particles and hydrated products improve Interfacial Transition Zone(ITZ)structure and benefit flexural fatigue performance.A composite reinforce effect is found with the incorporation of slag and polypropylene fibers.The optimum mixture contents 55%slag with 0.6%polypropylene fiber for the cumulative fatigue stress.Fatigue properties are decreased as the stress level increasing,the higher frequency reduces the fatigue strength more than lower frequency at a constant stress level. 展开更多
关键词 concrete flexural fatigue properties mechanism polypropylene fibers ground granulated blast furnace slag(ggbfs SEM
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Optimum Level of Replacement Slag in OPC-Slag Mortars 被引量:1
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作者 Fathollah Sajedi Payam Shafigh 《Journal of Civil Engineering and Architecture》 2010年第1期11-19,共9页
The present paper reports the testing of 14 OPC-slag mortars and 2 controls OPC and slag mortars. The main aim is to determine the optimum level of replacement slag for achievement to the highest early strength with r... The present paper reports the testing of 14 OPC-slag mortars and 2 controls OPC and slag mortars. The main aim is to determine the optimum level of replacement slag for achievement to the highest early strength with reasonable flow. Variable was the level of GGBFS in the binder. In this experimental work, two types of sands were used that are: silica and mining sands. It is determined that the optimum level of replacement slag is 40% and use of silica sand in OPC is preferable to mining sand and reversely, use of mining sand is preferred in GG100 to silica sand. All mortars had W/B and S/B 0.33 and 2.25, respectively. 展开更多
关键词 Ground granulated blast furnace slag ggbfs high early strength optimum level OPC-slag mortar flow
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Effects of Steel Slag Powder on Workability and Durability of Concrete 被引量:1
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作者 郭晓潞 施惠生 WU Kai 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2014年第4期733-739,共7页
The workability and durability of a type of sustainable concrete made with steel slag powder were investigated. The hydrated products of cement paste with ground granulated blast furnace slag(GGBFS) alone or with a ... The workability and durability of a type of sustainable concrete made with steel slag powder were investigated. The hydrated products of cement paste with ground granulated blast furnace slag(GGBFS) alone or with a combined admixture of GGBFS-steel slag powder were investigated by X-ray diffraction(XRD). Furthermore, the mechanism of chemically activated steel slag powder was also studied. The experimental results showed that when steel slag powder was added to concrete, the slumps through the same time were lower. The initial and fi nal setting times were slightly retarded. The dry shrinkages were lower, and the abrasion resistance was better. The chemically activated steel slag powder could improve compressive strengths, resistance to chloride permeation and water permeation, as well as carbonization resistance. XRD patterns indicated that the activators enhanced the formation of calcium silicate hydrate(C-S-H) gel and ettringite(AFt). This research contributes to sustainable disposal of wastes and has the potential to provide several important environmental benefi ts. 展开更多
关键词 concrete steel slag powder ground granulated blast furnace slag(ggbfs workability durability
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Quantitative Calculation of Hydration Products for Binary Slag-Portland Cement System
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作者 蒋金洋 SUN Guowen SUN Wei 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2014年第5期972-979,共8页
The reaction models and the quantitative calculation on the volume fraction of hydration products for binary ground granulated blast-furnace slag (GGBFS) cement system are presented, in which two important factors a... The reaction models and the quantitative calculation on the volume fraction of hydration products for binary ground granulated blast-furnace slag (GGBFS) cement system are presented, in which two important factors are taken into account, i e, the reactivity of GGBFS influenced by its chemical compositions and the partial replacement of aluminum phase in calcium silicate hydrate (C-S-H) gel. A simplified treatment is further suggested towards the quantification. In particular, when the replacement level of GGBFS is lower than 70%, the ratio of calcium over silica (C/S) is set at 1.5 or at 1.2 otherwise. The validity of the proposed model is addressed in terms of the contents of calcium Portlandite and non-evaporable water. 展开更多
关键词 Portland cement ggbfs reaction model hydration product
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The Impact of Marine Water on Different Types of Coarse Aggregate of Geopolymer Concrete
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作者 Shimaa Younis Megahed Abolwafa Mohamad Elthakeb +2 位作者 Walid Alsayed Mohamed Mohammed Taha Nooman Walid Hessian Soufy 《Journal of Minerals and Materials Characterization and Engineering》 2019年第5期330-353,共24页
This research studies the impact of different types of coarse aggregate on the behavior of geopolymer concrete based on both fly ash (FA) and ground granulated blast furnace slag (GGBFS) in different marine environmen... This research studies the impact of different types of coarse aggregate on the behavior of geopolymer concrete based on both fly ash (FA) and ground granulated blast furnace slag (GGBFS) in different marine environments. Aiming to solve the problems caused by the construction and demolition waste and the depletion of natural aggregates, in the present study coarse recycled aggregates is used to produce new green concrete with a fly ash-slag based geopolymer. By this examination, the research seeks to improve the quality and productivity of concrete used in construction and hydraulic projects. For this research, four mixtures containing different types of coarse aggregate in two different water environments were used. The utilized mixtures contained natural aggregate concrete (NAC) such as basalt and crushed marble. Also, recycled coarse aggregate concrete (RAC), which totally replaced natural aggregate, was presented in this paper such as crushed concrete and crushed ceramic. For this study, in the sieve analysis;specific and unit weights, was recorded. Furthermore, the mechanical properties were determined, using a compressive test that was conducted on the 7th, 28th, 56th and 90th days at different water environments;potable water (PW) and sea water (SW). Durability test was also performed for total absorption measurement. Results indicated that geopolymer concrete exhibits better strength in marine environments than in those of potable water. Results also showed that crushed marble (CMA) exhibits higher compressive strength and durability. 展开更多
关键词 GEOPOLYMER CONCRETE FLY Ash Ground Granulated Blast FURNACE Slag (ggbfs) Sea WATER Natural AGGREGATE CONCRETE Recycled CONCRETE AGGREGATE Compressive Strength and Durability
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Effect of mineral admixtures and repeated loading on chloride migration through concrete
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作者 Wu-man ZHANG Heng-jing BA 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2010年第9期683-690,共8页
The effect of fly ash (FA) and ground granulated blast furnace slag (GGBFS) on chloride migration through concrete subjected to repeated loading was examined. Portland cement was replaced by three percentages (20%, 30... The effect of fly ash (FA) and ground granulated blast furnace slag (GGBFS) on chloride migration through concrete subjected to repeated loading was examined. Portland cement was replaced by three percentages (20%, 30%, and 40%) of mineral admixtures. Five repeated loadings were applied to concrete specimens using a WHY series fully automatic testing machine. The maximum loadings were 40% and 80% of the axial cylinder compressive strength (f′c). Chloride migration through concretes was evaluated using the rapid chloride migration test and the chloride concentration in the anode chamber was measured. The results showed that the replacement percentages of mineral admixtures, the curing time and repeated loading had a significant effect on chloride migration through concrete. The transport number of chloride through concrete cured for 28 d increased with increasing FA replacement and markedly decreased with extension of the curing time. 20% and 30% GGBFS replacement decreased the transport number of chloride through concrete, but 40% GGBFS replacement increased the transport number. Five repeated loadings at 40% or 80% f′c increased the transport number of chloride for all mixes. 展开更多
关键词 CONCRETE Fly ash (FA) Ground granulated blast furnace slag (ggbfs) Chloride migration Repeated loading
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