Evaluating The Contractors Quality Control Practices On Construction Sites In Malaysia

2020 ◽

Keyword(s):

Quality Control ◽

Life Cycle ◽

Construction Control ◽

Construction Sites ◽

Actual Problem ◽

Construction Market ◽

Construction Products ◽

Underlying Causes ◽

Required Quality

In construction production, the safety of constructing buildings and structures is achieved by ensuring the required quality as a result of systematic construction control based on the implementation of a complex of technical, economic and organizational measures at all stages of the object's life cycle. The article deals with the actual problem of improving the quality of construction products-buildings and structures in conjunction with the activities of construction control bodies. The article presents the advanced foreign and domestic experience of ensuring the quality control at the construction sites, providing for the prevention of the underlying causes of defects and increasing the interest of the contractors directly. On the basis of the analysis of the current situation with quality control at the construction market, ways to improve its efficiency by developing a unified system of technological implementation of relevant requirements for the quality of construction products, determining the rational number and business load of construction control engineers, as well as the active activities of self-regulatory organizations in this area are offered.

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Water Quality Controls in Construction

1st Water Quality, Drought, Human Health and Engineering Conference ◽

10.1115/water2006-20020 ◽

2006 ◽

Author(s):

Claude J. Wookey

Keyword(s):

Water Quality ◽

Quality Control ◽

Human Exposure ◽

Water Discharge ◽

The United States ◽

Site Quality ◽

Construction Sites ◽

Water Quality Control ◽

Preventative Measure ◽

A Site

Water Quality control for construction sites is a requirement at any site within the United States. Erosion Controls are the first, and many times, last preventative measure for water discharge from a site. If these fail, streams, wetlands, or even off-site upland areas (yards, etc.) are adversely affected. Site quality is affected when valuable soil is lost and restoration requires replacement. Human exposure to contaminants, violation of governmental regulations, contractor reputation, and the overall economics involved in construction are at risk.

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Prospects of Seismic Upgrading a Weak R.C. School Building Using Light Gauge Steel Walls

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.777.179 ◽

2015 ◽

Vol 777 ◽

pp. 179-184

Author(s):

Ludovic Fülöp

Keyword(s):

Quality Control ◽

Reinforced Concrete ◽

Seismic Resistance ◽

School Building ◽

Construction Sites ◽

Building Frames ◽

Reinforced Concrete Building ◽

Concrete Building ◽

Earthquake Effects

Significant number of reinforced concrete building frames executed in the ‘50’s-60’s in Europe need seismic upgrading. At those times understanding of earthquake effects was insufficient and quality control on construction sites lacking. This combination resulted in buildings framed in reinforced concrete with bad quality materials and inadequate reinforcement. The low-medium rise buildings often house public functions today. In this paper, we analyze the potentials and limitations of using light prefabricated steel wall systems (LGSW) to upgrade frames to higher seismic standard. Results show that r.c. frames with virtually no seismic resistance (PGA~0.05·g) can be upgraded to resist intermediate earthquakes, possibly up to PGA~0.2·g. The LGSW’s have remarkable flexibility to adapt to the refurbishment requirements in terms of stiffness and strength, and also provide adequate ductility.

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https://www.acapublishing.com/dosyalar/baski/CEBACOM_2021_196.pdf

Journal of Cement Based Composites ◽

10.36937/cebacom.2020.003.004 ◽

2021 ◽

Vol 1 (3) ◽

pp. 16-22

Author(s):

İlker TEKİN

Keyword(s):

Quality Control ◽

Compressive Strength ◽

Shear Walls ◽

Limited Information ◽

Construction Sites ◽

Granulated Blast Furnace Slag ◽

Compressive Strength Of Concrete ◽

Non Destructive ◽

Ready Mixed Concrete

The compressive strength of concrete could be evaluated during and after construction because of a weakness in a reinforced concrete structural member appeared. Quality control of concrete in existing and new constructions can be evaluated by several methods. If the compressive strength did not comply with the design requirements, core samples from the low strength structural members are usually taken to evaluate the structural capability. In the construction sites, compressive strengths of columns and shear walls are the most important. Also, the preparing of quite simple reports for the quality control analyses of a construction is common especially in slab and beam analyses. Hence, in this paper, a new sightseeing assessment is recommended to this analysis. In this study, in-situ non-destructive and destructive investigations in newly constructed building slabs and beams were performed because of the weakness of concrete. With this scope, non-destructive and core sampling examinations were performed on slabs and beams according to the TS EN 13791. Building was constructed by using ready-mixed concrete with CEM I 42.5R and CEM II/B-S 42.5N type cement. As a result of this study, it is thought that the TS EN 13791 contains limited information for the evaluation of newly constructed building for concrete because of its varied ingredients. Compressive strength of concrete produced with granulated blast furnace slag like pozzolanic materials instead of cement needs more time to reach required strength if it is not designed for early strength.

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CONSTRUCTION QUALITY CONTROL OF UNBOUND LAYERS BASED ON STIFFNESS MODULUS CRITERIA / NESUJUNGTŲ SLUOKSNIŲ KONSTRUKCIJŲ KOKYBĖS KONTROLĖ, ĮVERTINANT STANDUMO MODULIO KRITERIJŲ

Journal of Civil Engineering and Management ◽

10.3846/13923730.2011.619328 ◽

2012 ◽

Vol 18 (1) ◽

pp. 5-13 ◽

Cited By ~ 11

Author(s):

Kamran Rafiei ◽

Amir Kavussi ◽

Shahaboddin Yasrobi

Keyword(s):

Quality Control ◽

Moisture Content ◽

Laboratory Testing ◽

Field Testing ◽

Engineering Properties ◽

Construction Sites ◽

Construction Quality ◽

Stiffness Modulus ◽

In Situ Conditions ◽

Moisture Percentage

NDT methods such as Portable Falling Weight Deflectometer (PFWD) provide measurements based on the engineering properties of materials (stiffness) instead of physical properties like field density and moisture content. However, PFWD testing method is not yet proven to be reliable enough for construction quality control. In this research, a laboratory testing unit box was prepared in which unbound materials were compacted at different compaction levels. The stiffness modulus of the compacted layers were then determined under PFWD Testing. The tests were repeated several days after construction when the materials moisture content was decreased to lower values. The results indicated that acceptable correlations exist between the stiffness modulus and both compaction percentage and moisture percentage. In addition, field testing was carried out on different unbound layers in several highway construction sites in Tehran and laboratory results were used in order to control in-situ conditions. With Comparing field and laboratory testing results, it was concluded that PFWD is an appropriate testing device for quality control and compaction monitoring of pavement layers during construction phases. Santrauka NDT metodai, kaip krintančio svorio deflektometrai (PFWD), leidžia matuoti technologines ir fizikines medzcaron;iagu savybes (standumą, tankį ir įmirki). Tačiau PFWD bandymu metodas ir dabar dar nera patvirtintas kaip patikimas konstrukcijų kokybei kontroliuoti. Šiame darbe atlikti laboratoriniai ir natūriniai bandymai, kuriuose buvo tirtos skirtingais lygiais sutankintų tarpusavyje nesujungtų sluoksnių konstrukcijos. Tiriamų medžiagų sluoksnių standumo moduliai buvo nustatyti PFWD metodu. Bandymas buvo pakartotas išlaikius konstrukciją keletą dienų, kai drėgmės kiekis medžiagose sumažejo. Rezultatai parodė, kad yra reikšmine koreliacija tarp standumo modulio ir abiejų sluoksnių sutankinimo lygio bei drėgmės kiekio. Vėliau Teherano vietovese buvo atlikti natūriniai konstrukcijų su skirtingais nesujungtais sluoksniais bandymai. Išanalizavus natūriniu ir laboratoriniu bandymų tyrimų rezultatus, buvo nustatyta, kad PFWD yra tinkamas bandymo metodas konstrukcijų kokybei kontroliuoti ir tinkamam dangos sluoksnių tankinimui parinkti.

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Quality Control in the Construction of Reinforced Concrete Buildings in Dar es salaam

Tanzania Journal of Engineering and Technology ◽

10.52339/tjet.v31i1.415 ◽

2008 ◽

Vol 31 (1) ◽

pp. 46-52

Author(s):

I.A. Rubaratuka

Keyword(s):

Quality Control ◽

Reinforced Concrete ◽

Construction Industry ◽

Good Practice ◽

Dar Es Salaam ◽

Control Measures ◽

Reinforced Concrete Buildings ◽

Construction Sites ◽

Concrete Buildings

Quality Control in the construction industry is very important to ensure that what is being done conforms to the applicable standards or good practice and the contract documents. In this article, results of investigations conducted at different construction sites for reinforced concrete buildings in Dar es Salaam to check if quality control measures are being implemented are discussed. It has been established that generally quality control is not properly carried out. Finally, measures to enhance quality control on sites are outlined.

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