bioconsolidation of cracks in masonry cement mortars by

Bio-consolidation of cracks in masonry cement mortars by ...

Jul 01, 2019  Bio-consolidation influenced compressive strength of masonry cement mortars containing cracks positively and enhanced the strength significantly, which was closer to original strength of specimens. This treatment also reduced the permeable properties of concrete due to effective sealant coming from biodeposition by Acinetobacter sp. SC4.

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Bio-consolidation of cracks in masonry cement mortars by ...

Bio-consolidation of cracks in masonry cement mortars by Acinetobacter sp. SC4 isolated from a karst cave April 2018 International Biodeterioration Biodegradation 141

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International Biodeterioration Biodegradation IBBS17 ...

Bio-consolidation of cracks in masonry cement mortars by Acinetobacter sp. SC4 isolated from a karst cave Mengmeng Li, Chaolin Fang, Satoru Kawasaki, Minsheng Huang, Varenyam Achal Pages 94-100

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Sand bioconsolidation through the precipitation of calcium ...

One of the highest urease-producing bacterium, Acinetobacter sp. SC4, was then used in consolidation of cracks created in masonry cement mortars. The bio-consolidation led to significant ...

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CRACK CONTROL IN CONCRETE MASONRY WALLS - NCMA

Because shrinkage cracks in concrete masonry are an aesthetic rather than a structural concern, control joints are typically only required in walls where shrinkage cracking may detract from the appearance or where water penetration may occur. TEK 10-2C (ref. 4) provides much more detailed information on control joint details, types and locations.

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Bio-consolidation of cracks with fly ash amended ...

In this study, Cement substitution with FA and bacterial suspension were introduced in the cement grout to seal the cracks in concrete structures. Different replacement dosages of FA (10–50%) in Cement and two water-binder ratios (0.45 and 0.5) were studied to achieve a suitable grouting material.

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International Biodeterioration Biodegradation IBBS17 ...

Bio-consolidation of cracks in masonry cement mortars by Acinetobacter sp. SC4 isolated from a karst cave Mengmeng Li, Chaolin Fang, Satoru Kawasaki, Minsheng Huang, Varenyam Achal

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Consolidation of quarry calcarenite by calcium carbonate ...

One of the highest urease-producing bacterium, Acinetobacter sp. SC4, was then used in consolidation of cracks created in masonry cement mortars. The bio-consolidation led to significant ...

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Types of Cracks in Masonry Buildings - Causes and Repair ...

Causes and Types of Cracks in Masonry Buildings and their Repair Methods The cracks appear in the masonry structure, at a certain period of time. Most commonly caused cracks with their respective causes and precaution, are explained below: Cracks in Brick Mortar Joints Vertical or horizontal cracks are seen at the brick mortar joints.

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Environmental safety of biotechnological materials and ...

Jan 01, 2020  Bio-consolidation of cracks in masonry cement mortars by Acinetobacter sp. SC4 isolated from a karst cave Int. Biodeterior. Biodegrad , 141 ( 2018 ) , pp. 94 - 100

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Tech Talk: Troubleshooting Cracks – Masonry Magazine

Jun 29, 2018  When exterior masonry is exposed to hot-cold temperature cycles over time, it expands and contracts. Construction materials can also move on their own due to their physical properties. Shrinkage, which in simple words is the contraction over time of cement-based products, affects concrete masonry blocks, mortar, and grout.

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Cracking in Masonry Walls or Brick Boundary Walls Causes ...

Aug 01, 2020  The nature of diagonal cracking in masonry usually along the mortar joints or along other weak bricks in the panel. And the magnitude of cracking depends on the magnitude of deflection or movement it has undergone. Masonry crack can be complete or

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Consolidation of archaeological gypsum plaster by ...

Sep 01, 2014  Gypsum-based mortars and plasters have been used since the advent of pyrotechnology (from around 12 000 BC) in architectural applications as joint mortars, to cover masonry or to support paintings and decorations .Gypsum was a rather common building and decorative material in the Levant and ancient Egypt , , as well as in the Mediterranean countries, especially during the Middle Ages , .

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Construction and Building Materials Vol 300, In progress ...

Analysis of mechanical properties of rubberised mortar and influence of styrene–butadiene latex on interfacial behaviour of rubber–cement matrix Zhe Xiong, Zhenxing Tang, Shaohua He, Zhen Fang, ...

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How to Prevent Cracks in Masonry Nitterhouse Masonry

Brick mortar joints: You may discover horizontal or vertical cracks in the brick mortar joints due to sulfate weakening the mortar. These fractures may appear a few years after construction, but you can prevent them by finding out the sulfate content of the masonry materials before you begin building.

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Utilization of microbial induced calcite precipitation for ...

in the fresh mortar paste up to a depth of 20 mm and length of 50 mm. Sand was injected into artificial cracks of cement mortar after 28 days curing at room temperature. During next 48 h, 10 ml of cells (1 OD) and equimolar (1 M) of urea/CaCl 2 were injected into artificial crack

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Biocement - an overview ScienceDirect Topics

Biocement can also be used to reduce the water conductivity of sand through bioclogging, as illustrated in Fig. 19.1.One of the methods developed by our research group is biocrust. This method uses urease-producing bacteria to precipitate a layer of calcium carbonate on top of sand as shown in Fig. 19.8.This hard crust layer has a permeability of less than 10 –7 m/s (Chu et al., 2012) and ...

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US9676673B2 - Bio-based repair method for concrete ...

US9676673B2 US14/891,550 US201414891550A US9676673B2 US 9676673 B2 US9676673 B2 US 9676673B2 US 201414891550 A US201414891550 A US 201414891550A US 9676673 B2 US9676673 B2 US 9676673B2 Authority US United States Prior art keywords liquid calcium concrete bacteria repair Prior art date 2013-05-17 Legal status (The legal status is an assumption and is not a legal conclusion.

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Cracks in Masonry Walls - Types, Causes and Repair of ...

🕑 Reading time: 1 minuteSeveral types of cracks occur in masonry walls in a building which can be minor and insignificant, some requiring expensive repairs and in some extreme cases the only solution is total demolition of the wall. Causes of these cracks in masonry

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Separation Cracks between RCC and Masonry Joints

Preventive Measures to Avoid Cracks Between RCC Beam Bottom and Top of Masonry Wall Joint: Proper monitoring should be done at the time of construction. Follow sound construction practice. Apply aggregate (finer one) wrapped in cement mortar 1:1 in the joint between RCC beam bottom and the top of masonry

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Repair and reinforcement of reinforced concrete and masonry

GeoLite ® Magma. Certified, eco‑friendly mineral geo‑mortar with a crystalline reaction geo‑binder base, for passivation, repair and monolithic consolidation of deteriorated concrete structures, ideal for use in GreenBuilding. Very low petrochemical polymer

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Cracks at Corners Concrete Construction Magazine

Oct 01, 2001  IÆm involved in a repair project on a building where there are vertical cracks near the corners. However, the crack patterns on this project arenÆt like those I have seen before.First, the building has vertical strip windows that alternate with 10-foot-wide masonry piers between the windows. With these piers being only 10 feet wide I think there would not be very much horizontal expansion ...

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Satoru Kawasaki (Faculty of Engineering Sustainable ...

Bio-consolidation of cracks in masonry cement mortars by Acinetobacter sp. SC4 isolated from a karst cave Mengmeng Li, Chaolin Fang, Satoru Kawasaki, Minsheng Huang, Varenyam Achal International Biodeterioration and Biodegradation 141 94 - 100 0964-8305 2018 [Refereed][Not invited]

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masonry flat Tecnical ata eet TDS - ROMABIO

NHL 3.5 and NHL 5.0 stucco mortars. Masonry Flat as a potassium silicate paint that can assist in the consolidation of cement, stuccos, and natural, absorbent, masonry surfaces increasing surface integrity for new and old materials. PRODUCT FEATURES A 92% natural mineral product, completely permeable/breathable, absorbs CO2,

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Bioconsolidation of Stone Monuments. An Overview ...

Jul 01, 2016  Bioconsolidation of Stone Monuments. An Overview Bioconsolidation of Stone Monuments. An Overview Nazel, Tarek 2016-07-01 00:00:00 This article reviews the carbonation process through biomineralization referred to as Microbial Induced Calcium Carbonate Precipitation (MICCP) for the conservation of carbonate stone monuments and historic building materials.

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Masonry and Cement Products Buying Guide - Lowe's

Feb 17, 2020  Hydraulic Cement. Preblended combination of fine sand, Portland cement, calcium and quick-setting additives. Rapid-setting, high-strength repair material designed to plug leaks instantly in concrete and masonry. Sets in 3 to 5 minutes. Use for blocking running water or leaks in cracked masonry or concrete surfaces.

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Chaolin Fang's research works Technion - Israel ...

Chaolin Fang's 12 research works with 159 citations and 1,901 reads, including: A Review on Role of Enzymes and Microbes in Healing Cracks in Cementitious Materials

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(PDF) Conserving Concrete Heritage Experts Meeting (1 ...

Conserving Concrete Heritage Experts Meeting (1) Angelica Stefan. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 34 Full PDFs related to this paper. Read Paper. Conserving Concrete Heritage Experts Meeting (1)

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Pore size distribution and ITZ performance of mortars ...

Request PDF Pore size distribution and ITZ performance of mortars prepared with different bio-deposition approaches for the treatment of recycled concrete aggregate This study aims to clarify ...

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Soudal Repair Express Cement Gap and Crack Filler Mortar ...

Soudal Repair Express Cement Gap and Crack Filler Mortar Masonry Beige Grey Description. Soudal Express Repair Cement. Cement Repair Express is a high quality filler with granular structure for easy and shrink free repairing of cracks and joints in concrete. Features: Very good adhesion to many mineral surfaces in indoor and outdoor applications.

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Conservation of stony materials in the built environment ...

Aug 19, 2015  Materials in the built environment are exposed to several agents that promote alteration processes resulting in features that might be considered detrimental of its value. There are diverse possible intervention measures that might, however, have unwanted side effects. Here are reviewed the main issues related to the struggle against these alteration processes, from the

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川﨑 了(カワサキ サトル)(工学研究院 環境循環システム部門 地圏

Bio-consolidation of cracks in masonry cement mortars by Acinetobacter sp. SC4 isolated from a karst cave Mengmeng Li, Chaolin Fang, Satoru Kawasaki, Minsheng Huang, Varenyam Achal International Biodeterioration and Biodegradation 141 94 - 100 2018年 [査読有り][通常論文]

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