Ceramics-silikaty最新文献_第8页

PERFORMANCE EVALUATION OF CEMENT MORTAR CONTAINING CONSTRUCTION AND DEMOLITION WASTE AS SUPPLEMENTARY CEMENT MATERIALS 含建筑垃圾水泥砂浆作为补充水泥材料的性能评价

IF 0.9 4区材料科学

Ceramics-silikaty Pub Date : 2022-07-26 DOI: 10.13168/cs.2022.0036

Imane Raini

{"title":"PERFORMANCE EVALUATION OF CEMENT MORTAR CONTAINING CONSTRUCTION AND DEMOLITION WASTE AS SUPPLEMENTARY CEMENT MATERIALS","authors":"Imane Raini","doi":"10.13168/cs.2022.0036","DOIUrl":"https://doi.org/10.13168/cs.2022.0036","url":null,"abstract":"The purpose of this study is to investigate the effect of fine powders from construction and demolition waste (CDW) as a replacement for cement on the properties of fresh and hardened cement paste and mortar. Specifically, the study focuses on three types of waste powders (WPs) which are: waste brick powder (WBP), waste concrete powder (WCP) and mixed waste powder (MWP). Each type of WP is used to replace 0 % to 15 % of cement. First, the milled powders are assessed in terms of their morphology (SEM) and composition (X-ray diffraction (XRD) and X-ray fluorescence (XRF)). Such an assessment is carried out based on consistency and setting time tests in order to examine the fresh behaviour of the cement pastes. Second, the mechanical properties, mineralogical and microstructural characteristics are evaluated in order to elucidate the effect of various WPs on the mortar samples. The results demonstrate that, according to the required standards, the use of each WP up to 15 % does not alter the mechanical properties of the cement mortar. However, the use of 5 % and 10 % WBP replacement levels was adequate for improving the strength. Thus, a 52.9 MPa maximum strength was achieved with this mix. Furthermore, the microstructure analyses indicate that the WBP and WMP show a denser mortar structure compared to the reference one. Consistent with the microstructural analyses, the mineralogy analysis reveals that the WBP and MWP have a significant impact on the hydration products of the elaborated mortars.","PeriodicalId":9857,"journal":{"name":"Ceramics-silikaty","volume":"294 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86751544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

MECHANICAL AND TRIBOLOGICAL CHARACTERISTICS OF ALUMINIUM HYBRID COMPOSITES REINFORCED WITH BORON CARBIDE AND TITANIUM DIBORIDE 碳化硼和二硼化钛增强铝杂化复合材料的力学和摩擦学特性

IF 0.9 4区材料科学

Ceramics-silikaty Pub Date : 2022-07-26 DOI: 10.13168/cs.2022.0035

M. Vimal raja

{"title":"MECHANICAL AND TRIBOLOGICAL CHARACTERISTICS OF ALUMINIUM HYBRID COMPOSITES REINFORCED WITH BORON CARBIDE AND TITANIUM DIBORIDE","authors":"M. Vimal raja","doi":"10.13168/cs.2022.0035","DOIUrl":"https://doi.org/10.13168/cs.2022.0035","url":null,"abstract":"The known superior properties in aluminium-based composites are being used in a variety of fields. The matrix adopted in this study was Al7075, and the reinforcements were boron carbide (B 4 C) and titanium diboride (TiB 2 ) mixed in different amounts. The titanium diboride percentage was kept constant at 3 wt. % while the boron carbide percentage was changed. The stir casting process used to make the composites and its manufactured composites were evaluated through tests on different material properties, such as the density, hardness, compression, impact, and tensile properties. According to the results, the properties of the samples were improved when they were reinforced with 9 wt. % B 4 C and 3 wt. % TiB 2 . Scanning Electron Microscopy (SEM) was adopted to study the fracture mechanisms. The presence of dimples, cracks, and voids were clearly visible. The brittle type of fracture was also visible due to the better bonding between the matrix and the hybrid reinforcement. The Al7075 sample with 9 % of B 4 C and 3 % of TiB 2 has a higher hardness value of 76HV. A maximum compressive strength of 231 MPa and maximum tensile strength of 233 MPa was achieved in the mixture of 9 wt. % B 4 C and 3 wt. % TiB 2 . Wear studies are used to examine the friction characteristics of manufactured samples. Experiments were conducted using the L'16 Taguchi design, with the aid of input factors such as load, sliding distance, and material type. The known output result was observed to be the coefficient of friction. An ANOVA was used to estimate the effect of the coefficient of friction with respect to the input characteristics. Finally, the morphological study of the worn surface was carried out by using SEM, while the wear track, micropits and absence of grooves were also studied.","PeriodicalId":9857,"journal":{"name":"Ceramics-silikaty","volume":"80 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85961208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

PREPARATION OF SILVER DOPED RICE HUSK SILICA COMPOSITES USING SOL GEL METHOD 溶胶-凝胶法制备掺银稻壳硅基复合材料

IF 0.9 4区材料科学

Ceramics-silikaty Pub Date : 2022-07-25 DOI: 10.13168/cs.2022.0032

Pulung Karo-karo

引用次数: 0

EXPERIMENTAL VERIFICATION OF THE NEW MODELS APPLIED TO GLASS FIBRE REINFORCED CONCRETE (GFRC) CONFINED WITH GLASS FIBRE REINFORCED POLYMER (GFRP) COMPOSITES 新模型应用于玻璃纤维增强聚合物(gfrp)复合材料约束下玻璃纤维增强混凝土(gfrc)的试验验证

IF 0.9 4区材料科学

Ceramics-silikaty Pub Date : 2022-07-25 DOI: 10.13168/cs.2022.0034

D. Yahiaoui

引用次数: 0

EFFECTS OF RAW MATERIAL RATIO, CURING TEMPERATURE AND MAGNESIUM OXIDE ACTIVITY ON THE HYDRATION OF BASIC MAGNESIUM SULFATE CEMENT 原料配比、养护温度和氧化镁活性对碱式硫酸镁水泥水化性能的影响