Authors:Yan Yao, Dao-Wu Yang, Ju-Lan Zeng, Li-Xian Sun, and Wen-Jian Li
-calorimetry with an eight-channel micro-calorimeter (TAM Air). Furthermore, the effects of fluorgypsum and fly ash on the compressivestrength of cement were also investigated.
Authors:Alina Vattai and Nikoletta Rozgonyi-Boissinot
normal stress (σ n ), joint compressivestrength (JCS), friction angle (φ), and joint roughness coefficient (JRC). JRC can be estimated by numerous methods: (a) the comparison of the measured profiles of the specimens with standard ones ( Barton and
Authors:Abbas Al-Hdabi, Mohammed K. Fakhraldin, Rasha A. Al-Fatlawy, and Tawfek Sheer Ali
enhancement levels were assessed based on the results attained from compaction tests, consistency limits and Unconfined CompressiveStrength (UCS) tests, which were made on samples of soil treated with FA1 and FA2 and exposed to several curing periods i.e. 0
-hydrated in blended cement paste, especially in early ages [ 8 ], which leads to fairly poor bonding between fly ash particles and hydration products. As a result, the compressivestrengths of gap-graded blended cements with coarse fly ash (BCF) are much lower
Authors:Julia Cigasova, Nadezda Stevulova, and Jozef Junak
In this paper, the effect of mean particle length of hemp hurds on compressive strength and other parameters of fibrous-composites is studied. Hemp hurds of various origin (Hungarohemp LTd, Nagylak, Hungary; Hempflax, Netherlands) with a wide particle size distribution were used in the experiments. Six samples of hemp hurds with various mean particle length (from 7.3 mm to 39.9 mm) were used for the preparation of fibrous composites based on MgO-cement as a binder. Bulk density, compressive strength, thermal conductivity and water absorbability of fibrous composites after 28 days of hardening were tested. The impact of men particle length of hemp hurds slices on values of bulk density, compressive strength and water absorbability of hardened composites was confirmed.
The present paper focuses on the re-evaluation of archive engineering geological data of sic core drillings at one of the new metro stations of Budapest (Kálvin square, metro line 4). More than 1000 data of total coring length of more than 210 meters were used for statistical calculations. The data set includes index of plasticity, skewness, void ratio, water content, dry and water saturated bulk density, relative humidity, angle of friction, cohesion and compressive strength. Based on the data set the engineering geological description of sediments was reevaluated, and sand, clay, silt and bentonite-rich horizons were identified. Three new crosssections were prepared. Statistical analyses proved that there is an increase in cohesion and density of clays and silts with depth, indicating the role of consolidation.
Authors:Eethar Thanon Dawood and Marwa Saadi Mhmood
that blended cements with four components have on the flow-ability and compressivestrength of mortars. The objectives of this work are to prepare mortar mixes for each level of cement substitution and test their flow and compressivestrength
Authors:M. S. Amin, S. A. Abo-El-Enein, A. Abdel Rahman, and Khaled A. Alfalous
revealed that silica fume accelerated both the C 3 S and C 3 A hydration in the first few hours [ 2 ]. In addition, the compressivestrengths of silica fume cement paste and mortar were evaluated at various water–cementitious ratios; the results showed that