Results 71 to 80 of about 300,116 (255)

Effect of Time Period between Mixing and Application of Cement Mortar on Compressive Strength

Journal of Engineering and Sustainable Development, 2013
This paper investigates the effects of time period between mixing and application of cement mortar on compressive strength. Two groups with a total of (135) cubes were cast and tested at 28 days age.
Ahmed Redha Saleem
doaj  

Influence of natural fibers on physical, mechanical, and fire‐resistant properties of microconcrete

Structural Concrete, EarlyView.
Abstract This study examined the influence of natural fibers on the physical, mechanical, and fire‐resistant properties of microconcrete, in comparison with conventional polypropylene fibers used in cement composites. The fibers were characterized by FTIR and TGA/DSC to assess their composition and thermal stability, and FTIR was also performed after ...
Ivanka Netinger Grubeša, Sandra Juradin, Silvija Mrakovčić, Lidija Radovanović, Milica Vasić, Huseyin Bilgin   +5 more
wiley   +1 more source

Behavior of manufactured sand and recycled coarse aggregate concrete‐filled steel tubular stub columns with circular section

Structural Concrete, EarlyView.
Abstract Accelerated urbanization has intensified environmental concerns due to excessive natural resource consumption and construction waste generation. Circular concrete‐filled steel tube (CFST) columns incorporating manufactured sand recycled coarse aggregate (MS‐RCA) concrete have emerged as an innovative composite element offering notable ...
Minsheng Guan, Qi Chen, Gang Wang, Aiguo Xiong, Ying Wang, Le Li, Anne W. M. Ng, Qing Quan Liang   +7 more
wiley   +1 more source

Cold‐curing effects on the strength development and sulfuric acid resistance of basalt fiber‐reinforced hybrid alkali‐activated slag mortars

Structural Concrete, EarlyView.
Abstract Cold weather conditions impose substantial constraints upon the performance and long‐term resilience of concrete materials. Alkali‐activated slag (AAS) presents itself as a promising substitute, exhibiting sustained hydraulic activity even when exposed to ambient conditions characterized by low temperatures.
Zeynep Bahçeci, Murat Dener, Ahmet Benli, Bilal Balun   +3 more
wiley   +1 more source

Identification of invisible damage in prestressed concrete bridges—A demonstrator case using coda wave interferometry

Structural Concrete, EarlyView.
Abstract During their life cycle, prestressed concrete bridges are prone to wire breaks of their tendons due to fatigue or stress corrosion cracking. However, not all structures show visible cracking on the surface, which would provide timely warning of otherwise invisible damage. Brittle failure may occur.
Noah Sträter, Felix Clauß, Mark Alexander Ahrens, Peter Mark   +3 more
wiley   +1 more source

Quality of type I Portland cement from Ghana and UK [PDF]

, 2015
Type I Portland cement is general purpose cement found in many countries and it is manufactured by different companies. This study sought to compare the properties of Type I Portland cements from Ghana (less economically developed country) and United ...
Isaac Boateng, Danso, Humphrey, Boateng, Isaac, Humphrey Danso   +3 more
core  

Durability performance of a high‐performance fiber‐reinforced concrete for bridge applications

Structural Concrete, EarlyView.
Abstract This paper investigates the durability performance of a coarse‐aggregate high‐performance fiber‐reinforced concrete (HPFRC) developed as a cost‐efficient material solution for precast bridge applications. A comprehensive experimental program was conducted to assess the resistance of the material to the principal deterioration mechanisms ...
Rolando Baldiviezo, Rafael Ruiz, Borja Regúlez, Carmen Andrade, Hugo Corres, Valle Chozas‐Ligero, Leonardo Todisco   +6 more
wiley   +1 more source

Research on the Mechanical Properties and NMR Characteristics of Cement Mortar during Freeze-Thaw Cycles

Advances in Civil Engineering, 2019
Low-field nuclear magnetic resonance (NMR) technology has the characteristics of nondestructive, rapid, and accurate. In the present paper, the mechanical properties and the size and distribution of pores of cement mortar during freeze-thaw cycles were ...
Taoying Liu, Yunmin Wang, Keping Zhou, Feng Gao, Shenghua Xie   +4 more
doaj   +1 more source

Efflorescence of Cement Mortar

Journal of the Ceramic Association, Japan, 1960
セメントとモルタルの配合に関する各種要因がエフロレセンスとこれに関連ある特性におよぼす影響について調べた. エフロレセンスはセメント中のアルカリ量を減じ, またモルタルを緻密にすることによって軽減される. モルタルの吸水, 乾燥および透水の速度は主として水セメント比が低く, 水和度の高いことによって減少する. したがってモルタルを緻密にするために粗目の砂を用い, 添加材として高炉水砕スラグの微粉末を一部セメントに置換して加えることはエフロレンス防止の面でも有効と思われる. ただしモルタルを富配合にすることは同時にアルカリ含有量を高めることになり明らかな効果をもたらさなかった.
KONDO, Renichi, WAKUI, Toshikazu, YAMAUCHI, Toshiyoshi   +2 more
openaire   +2 more sources

Mechanical, rheological, and durability performances of GGBS‐based concrete for potential application to prestressed structures

Structural Concrete, EarlyView.
Abstract Ground granulated blast‐furnace slag (GGBS) is a widely used clinker substitute in concrete, recognized for its potential to significantly reduce environmental impacts. However, its application in prestressed concrete remains limited in several countries, mainly due to concerns regarding early‐age mechanical performance and long‐term ...
D. Rolando Baldiviezo, Leonardo Todisco, Cristina Argiz, Carmen Andrade, Amparo Moragues, Jaime C. Gálvez, Hugo Corres   +6 more
wiley   +1 more source