scholarly journals Application of New Concrete Materials in Civil Engineering

2020 ◽  
Vol 3 (2) ◽  
pp. 44
Author(s):  
Keli Tong
Keyword(s):  
Service Life ◽  
Physical Performance ◽  
Civil Engineering ◽  
Cement Industry ◽  
Continuous Development ◽  
Concrete Materials ◽  
Life Function

<p>In recent years, the cement industry has made continuous development, while there are more and more varieties of concrete materials, and new concrete materials play an increasingly important role in the field of civil engineering. Compared with traditional concrete, it has higher durability and strength, which can be consistent with the service life, function and physical performance of civil engineering. On this basis, the application of new concrete materials in the field of civil engineering is analyzed in order to provide the corresponding reference for people in the same industry.</p>

scholarly journals High Performance Concrete Materials with Applications in Building and Civil Engineering

2017 ◽  
Vol 2017 ◽  
pp. 1-3 ◽  
Author(s):  
Peng Zhang ◽  
Song Han ◽  
Serina Ng ◽  
Xu-Hao Wang
Keyword(s):  
High Performance ◽  
Civil Engineering ◽  
High Performance Concrete ◽  
Concrete Materials

scholarly journals NEUROMUSCULAR ATTRIBUTES ARE ASSOCIATED WITH POOR MOBILITY IN OLDER ADULTS WITH VASCULAR RISK CONDITIONS

2019 ◽  
pp. 1-7
Author(s):  
A.J. Jor’dan ◽  
M.E. Jacob ◽  
E. Leritz ◽  
J.F. Bean
Keyword(s):  
Older Adults ◽  
Range Of Motion ◽  
Physical Performance ◽  
Lower Limb ◽  
Gait Speed ◽  
Knee Flexion ◽  
Late Life ◽  
Vascular Risk ◽  
Leg Strength ◽  
Life Function

Background: The mobility of older adults is limited by the compounding effects of vascular health conditions, or vascular risk burden. However, little is known about the role of neuromuscular attributes among those in which vascular risk burden contributes to mobility limitations. Objective: We investigated (1) the relationship between the absence/presence of type 2 diabetes, hypertension, and/or obesity and mobility measures and neuromuscular attributes, and (2) whether the association between vascular risk burden and mobility is mediated by lower limb neuromuscular attributes. Design: Cross-sectional analysis of baseline data from 430 older adults within the Boston RISE Study. Measurements: Measures of mobility were the Short Physical Performance Battery, habitual gait speed, and functional mobility as measured by the Late Life Function Instrument. We also evaluated lower limb neuromuscular attributes, namely leg strength, leg velocity, trunk extensor muscle endurance, knee and ankle range of motion, and sensory loss. Results: Participants self-reported the presence of None (n=93), One (n=179), Two (n=114), or Three (n=44) of the following conditions: diabetes, hypertension, and obesity. Multivariable regression models indicated that those with a greater vascular risk burden had worse performance on the Short Physical Performance Battery (p=0.01), slower gait speed (p=0.0003) and lower Basic and Advanced Late Life Function Instrument scores (p<0.003). These associations were independent of multiple covariates. Vascular risk burden was also found to be negatively associated with leg strength (p=0.0002) and knee flexion range of motion (p<0.0001) and an associated non-significant trend was observed with leg velocity (p=0.06). In addition, the association between vascular risk burden and mobility outcomes were found to be partially mediated by leg strength, leg velocity, and knee flexion range of motion. Conclusions: Among older adults with vascular risk burden and mobility problems, neuromuscular impairments in attributes such as leg strength, leg velocity, and knee range of motion may need to be treatment priorities.

scholarly journals Analysis of the Application of Grouting Technology in Building Civil Engineering

2020 ◽  
Vol 2 (1) ◽  
pp. 5
Author(s):  
Binghao Zhou ◽  
Gerong Zhang ◽  
Cheng Zeng ◽  
Miao Zhang
Keyword(s):  
Construction Projects ◽  
Civil Engineering ◽  
Social Economy ◽  
Construction Process ◽  
Continuous Development ◽  
Safety Hazards ◽  
Material Life ◽  
Building Safety ◽  
Common Problems

<p>Due to the continuous development of social economy, people's demand for materials is also increasing. In the context of increasing attention to the quality of material life and quality, people's attention and requirements for building safety have also increased. Cracks in buildings are the most common problems of civil engineering in the current construction, which will seriously affect the aesthetics and safety of buildings, thereby bringing hidden safety hazards to people's production and life. It is very necessary to improve the safety of construction civil engineering. In the construction process, the use of grouting technology can effectively avoid the occurrence of cracks. This article discusses and analyzes the application of grouting technology in order to provide some methods and suggestions for future construction projects.</p>

scholarly journals Improving Performance And Durability Of Concrete

2021 ◽  
Author(s):  
Mohammad R. Nazeran
Keyword(s):  
Service Life ◽  
Porous Material ◽  
Concrete Structure ◽  
High Quality ◽  
Significant Deterioration ◽  
Design Service Life ◽  
Chloride Attack ◽  
New Material ◽  
Concrete Materials ◽  
Maintenance Problem

Concrete is a porous material with different size of pores and cracks. Even the high quality concrete is a porous material which can pass the water through its cement paste. Porosity of the concrete can affect the natural performance of the concrete structure. Usually the water that comes from the environment contains the soluable contaminates which may initiate the reaction with the concrete materials and reduce the serviceability and design service life of the concrete. Durable structures to withstand significant deterioration can help to reduce the maintenance problem and conserves energy, money, materials and resources. The purpose of this research is to determine the major durability problem of concrete structure. The effects of critical environment deterioration such as sulfate and chloride attack was studied. Also the use of recycle and new material that might offset the destructive effects of environment attack to improve the durability or reduce the permeability was investigated.

scholarly journals Parallel Code Execution as a Tool for Enhancement of the Sustainable Design of Foundation Structures

2021 ◽  
Vol 13 (3) ◽  
pp. 1145
Author(s):  
Jiri Brozovsky ◽  
Radim Cajka ◽  
Zdenka Neuwirthova
Keyword(s):  
Service Life ◽  
Civil Engineering ◽  
Sustainable Design ◽  
Numerical Models ◽  
Computer Hardware ◽  
Engineering Practice ◽  
Engineering Structures ◽  
Model Case ◽  
In Situ Experiments ◽  
Complex Models

Civil engineering structures are always in interaction with the underlying parts of the Earth. This form of interaction results in deformations and stresses that affect the service life of structures. Long and predictable service life is one of important aspects of sustainable design. Thus, good knowledge of the interaction effects is an essential part of sustainable design. However, to obtain this information, the use of complex numerical models is often necessary. In many cases, the creation and analysis of such complex models are not possible with the tools usually available in civil engineering practice. Technically, the necessary software and computer hardware exist, but their use for such tasks is still very infrequent and includes many challenges. The main aim of this article was thus to propose an approach of numerical analysis that utilizes parallel supercomputers and software based on the finite element method. The paper concentrated on the feasibility of the solution and on calculation times, because these aspects are usually the main reasons why engineers in practice tend to reject these approaches. The approach was demonstrated on a model case that was compatible with actual in situ experiments executed by the author’s team, and thus the validity of the computed results is verifiable. Limitations of the proposed approach are also discussed.

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