Results 81 to 90 of about 300,116 (255)

Assessment of mortar evolution in pig slurry by mechanical and ultrasonic measurements [PDF]

, 2010
This work presents the results obtained in a long-term experiment focused on the study of the evolution of cementitious materials immersed in pig slurry at real conditions.
Segura Pérez, Ignacio, Moragues Terrades, Amparo, González Hernández, Margarita, Sanchez Espinosa, Elvira   +3 more
core   +1 more source

Properties of cement–lime mortars vs. cement mortars containing recycled concrete aggregates

Construction and Building Materials, 2015
Abstract Cement based materials have a very special presence amongst building and construction materials, and therefore their recycling is of capital importance. In this research, concrete wastes were used as replacement of natural aggregates in cement and cement–lime mortars. The mortars were cured for 28-days with an increasing substitution of fine
RAEIS SAMIEI, REZA, DANIOTTI, BRUNO, PELOSATO, RENATO, DOTELLI, GIOVANNI   +3 more
openaire   +2 more sources

Testing and modeling reinforced 3D concrete printing

Structural Concrete, EarlyView.
Abstract 3D Concrete Printing (3DCP) provides several advantages, including construction productivity and sustainability, although the presence of cold joints reduces structural performance, particularly in zones subjected to tensile stresses. In addition, it is difficult to reinforce 3DCP structures with conventional steel rebars, generally used to ...
Haruto Tasaki, Noriyuki Kobayashi, Tomoya Asakawa, Alessandro P. Fantilli, Yao Ding, Ryo Egawa, Kazunori Ohno, Tomoya Nishiwaki   +7 more
wiley   +1 more source

Deflection‐based assessment of residual prestress in simply‐supported bridges accounting for creep variability

Structural Concrete, EarlyView.
Abstract Several test methods have been proposed in the literature for measuring the level of residual prestress, most of them involving either semi‐ or fully destructive techniques for local measurements which could be highly sensitive to boundary conditions and execution details.
Giuseppe Zarrella, Daniele Losanno, Alfred Strauss   +2 more
wiley   +1 more source

Effect of Dispersion Method for Nano-Materials on Some Mechanical Properties of Cement Mortar

Diyala Journal of Engineering Sciences, 2019
This study was involving the dispersion method of nano-materials replacement and the interaction with cement mortar behavior for many mortar samples under variable curing time ,with constant water to cement ratio (W/C=0.45) .Some mechanical properties ...
Mohammed J. Kadhim, Hamza M. Kamal
doaj   +1 more source

Bond, tension‐stiffening, and cracking in multi‐generational recycled aggregate concrete subjected to shrinkage strains

Structural Concrete, EarlyView.
Abstract The concrete industry is responsible for a significant portion of global waste production and multi‐generation recycled aggregate concrete (MGRAC) is a means to allow the sector to transition to a circular economy framework. To predict the behavior of MGRAC at the member level there is a need to understand the underlying mechanics of bond ...
Lloyd Dadd, Phillip Visintin, Bree Bennett, Tianyu Xie   +3 more
wiley   +1 more source

Influence of partial replacement TiO2 nanoparticles on the compressive and flexural strength of ordinary cement mortar

مجلة النهرين للعلوم الهندسية, 2017
In this paper, the compressive and flexural strength together with microstructural analysis of mortar by partial replacement of cement with Nano-TiO2 particles has been studied.
Mohammed M. Salman, Khalid M. Eweed, Amjed M. Hameed   +2 more
doaj  

Evaluation of cold joint effects on the microstructure and mechanical behavior of three‐dimensional printed concrete specimen

Structural Concrete, EarlyView.
Abstract 3D concrete printing (3DCP) is an automated construction technique that uses an extrusion process to fabricate structures efficiently. However, the layer‐by‐layer process can create interlayer weaknesses, and interruptions during printing can result in cold joints, which can negatively affect the structural behavior.
Sung‐Jo Kim, Inken Jette Rasehorn, Dietmar Stephan, Tong‐Seok Han   +3 more
wiley   +1 more source

Structural testing and analytical model of Reinforced Concrete (RC) prisms with 3D‐printed concrete permanent formwork under compressive loading

Structural Concrete, EarlyView.
Abstract The implementation of traditional steel reinforcement in 3D concrete printed structures is a major challenge. Although 3D‐printed structures may be used as formwork, the knowledge about their structural contribution is limited. This research aims to experimentally evaluate the structural performance of reinforced concrete prisms with 3D ...
Luis M. de la Flor Juncal, Allan Scott, Don Clucas, Giuseppe Loporcaro   +3 more
wiley   +1 more source

Effects of light crude oil contamination on the physical and mechanical properties of geopolymer cement mortar

, 2018
Fly ash and oil contaminated sand are considered as the two waste materials that may affect environment. This paper investigated the suitability of producing geopolymer cement mortar using oil contaminated sand.
Abousnina, Rajab, Zhang, Zuhua, Lokuge, Weena, Weena Lokuge, Rajab Abousnina, Allan Manalo, Manalo, Allan, Lokuge, W, Manalo, A, Zuhua Zhang, Zhang, Z   +10 more
core   +1 more source