Flowable high strength cementitious matrices for ferrocement applications

Shannag, M. Jamal; Mourad, Shehab

doi:10.1016/j.conbuildmat.2012.06.051

Cited by 40 publications

(14 citation statements)

References 6 publications

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“…Same analogy was also applied on mortar mixes. 15% SF enhanced compressive strength of mortar by 17% and reached to 63.8MPa in 28 days at 0.4 w/c ratio [8]. Senhadji et al also observed similar fact [9].…”

Section: Strengthmentioning

confidence: 69%

Recent trends in development of self‐flowing mortar incorporating supplementary cementitious materials

Sakir

Kaish

Mutalib

2016

Proceedings of 2nd International Electronic Conference on Materials

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Self-flowing mortar (SFM) is being popular in recent time. Its' easy-placement nature makes it suitable for narrow or congested reinforced places. To comply with modern-age needs, many supplementary cementitious materials (SCMs) are gaining importance nowadays. Using industrial and agricultural wastes as SCM, ensures proper management of many hazardous materials and saves cost as well. Incorporation of these two techniques can offer cost-effective and environment-friendly solutions to many construction problems. Many researchers studied the effect of different SCMs on mortar properties in recent years. The objective of this study is to summarize the findings of recent experiments. This will help the experts of this field to optimize their mix design easily, as well as, the researchers to find the research gap and determine the direction of their future studies.

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Section: Strengthmentioning

confidence: 69%

Recent trends in development of self‐flowing mortar incorporating supplementary cementitious materials

Sakir

Kaish

Mutalib

2016

Proceedings of 2nd International Electronic Conference on Materials

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“…The repair method implemented in this study to counteract the moderate concrete damage caused by alkali silica reaction, ASR, and salt scaling included the following steps: the area of damaged concrete was bordered using a marker pen; breaking the concrete beyond the bordered area until reaching a sound concrete, using a jack hammer for saw-cutting the perimeter of the broken area to avoid feathered edges; damaged and easily removable concrete was chipped away; the dust was removed by air blowing and washed with clean water to achieve saturated surface dry substrata; bonding low viscosity material such as epoxy resin on the surface of old concrete to ensure full bond with the new concrete overlay; covering the broken concrete area with a suitable wooden forms; injecting a high strength cementitious grout at specific locations through holes in the forms using an injection pump [27]; the cementitious grout should be flowable, and contains silica fume and fly ash and had a water to cementitious materials ratio not exceeding 0.4 by weight of cement [28]; and curing the water tight overlay for a period of one week. For the structural members which suffered severe damage of more than 30% of their surface area, external strengthening of the defects injected with high strength cementitious grouts, using CFRP strips and or jackets would be a better choice for enhancing their flexural capacity and maximizing their service life.…”

Section: Structural Repair Of Slabs Against Asr and Salt Scaling Damagementioning

confidence: 99%

Strengthening and Repair of a Precast Reinforced Concrete Residential Building

Shannag

Higazey

2020

Civ Eng J

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The deterioration or ageing of the existing infrastructures coupled with increased safety requirements necessitate immediate strengthening. Developing long lasting and cost effective repair techniques and materials continue to capture the attention of concrete professionals worldwide. The main purpose of this investigation was to extend the life span of a multi-storey precast reinforced concrete structure built in Riyadh 40 years ago. The condition assessments relied on analytical tools, visual, field and laboratory experiments for core samples collected from the building. The analytical checks of the building revealed considerable deflections of some slabs because of design error. The field and chemical analysis tests performed, confirmed the occurrence of durability defects as a result of poor workmanship during the construction stage. Several state-of-the-art repair techniques and materials were used for enhancing the service life of the structure at a minimum cost. The Repair strategy implemented included, removal of the deteriorated concrete, pouring a bonding agent on the surface of the damage, followed by injecting high strength cementitious grouts, supporting the deflected slabs using I-section steel beams, using cathodic protection to prevent corrosion, strengthening the columns and beams using carbon fiber reinforced polymer (CFRP) sheets, and steel jackets. Doi: 10.28991/cej-2020-03091630 Full Text: PDF

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“…Torsion is a supreme aspect which is considered along with other basic structural actions. The torsional effects cannot be ignored in the present-day design due to (I) Large torsional moments tempted in structures and (II) Critical safety features used in project methods [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

Section: Concrete Structures Are Imperiled To Basic Structuralmentioning

confidence: 99%

“…Calculation of total comparative significance of i th alternate, based on weighted sum method (WSM) using equation 8: 9Step 4. Calculation of total comparative significance of i th alternate, based on weighted product method (WPM) using equation 9: 10Step 5: Calculation of total comparative significance of alternatives is done using equation 11and ranked from higher value to lower value [23]: (11) The cracking and ultimate torque of beams by all four methods was presented in Table-III…”

Section: Figure 3 Represents Various Values For Prediction Of Torque mentioning

confidence: 99%

Torsional Strength Determination of Ferrocement U-Wraps RC Beams with using Different Methods

Behera*,

Bagal

2020

IJRTE

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Retrofitting of distressed structures is a major concern worldwide for researchers particularly against torsion. Determination of torsional strength of retrofitted RC beams “U” wraps is again a difficult task. The experimental program is taken up with 30 rectangular beams tested under pure torsion. Torque of such a “U” wrapped RC beam with other dimension and material cannot be derived from these experimental results. To compute the same; analytical method based on softened truss model of Hsu is employed with modification on material properties. Both experimental and analytical methods are unable to provide a single equation to quantify the torsional strength. To overcome the same, soft computing method MARS and WASPAS method is employed in the present investigation. The methods are easy and time saving.

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Flowable high strength cementitious matrices for ferrocement applications

Cited by 40 publications

References 6 publications

Recent trends in development of self‐flowing mortar incorporating supplementary cementitious materials

Recent trends in development of self‐flowing mortar incorporating supplementary cementitious materials

Strengthening and Repair of a Precast Reinforced Concrete Residential Building

Torsional Strength Determination of Ferrocement U-Wraps RC Beams with using Different Methods

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