accelerating admixtures for shotcrete

Admixtures - Euclid Chemical

Masonry/MCP Admixtures. Euclid Chemical provides a range of admixtures to meet the needs of the block, paver, roof tile, hollow core slab and dry-cast pipe producers. These products are used to improve the production efficiency, performance, and visual appeal of machine-made concrete products.

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Accelerating and Waterproofing Shotcrete Admixture ...

Accelerating and Waterproofing Shotcrete Admixture. Description: Durashot is the range of Dura set accelerating and waterproofing shotcrete admixtures both in liquid and powder forms. They are sometimes finely modified to suit the particular brand of cement being used at site. Durashot is used for shotcrete

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MasterSet FP 20

MasterSet FP 20 admixture is a multi-component, non-chloride, accelerating and water-reducing admixture formulated to accelerate concrete setting time and increase early and ultimate strengths across a wide range of ambient temperatures (hot, mild, cold and subfreezing).

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accelerating-admixtures-for-concrete.pdf | Calcium | Concrete

Accelerating admixtures affect the rates of reactions between cement and water to give an overall increase in the hydration rate. Thus, the use of accelerators in concrete provides a shortening of setting

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Specialty materials / Products & systems | Weber Middle East

Shotcrete admixtures. Discover our full range of shotcrete accelerating admixture Corrosion inhibitors. Corrosion inhibitors. Discover our full range of corrosion inhibitor solution Concrete pigments. Concrete pigments. Discover our full range of powder pigments for concrete

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Concrete Admixtures | Sika AG

Shotcrete Admixtures ASTM C1141 ASTM C494 Standard Specification for Chemical Admixtures for Concrete covers the materials and the test methods for use in chemical admixtures to be added to hydraulic-cement concrete mixtures in the field.

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Shotcrete Specification and Testing

Shotcrete Specification And Testing by I. Leon Glassgold Shotcrete has been an important part of the ... ing Quick-Setting Accelerating Admixtures for Shotcrete by the Use of Gillmore Needles; 2. C 1117 Standard Test Method for Time of Setting of Shotcrete Mixtures by Penetration

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New Concrete Admixture For Sprayed Concrete

Spraye concrete/shotcrete: It is a gerneral construction method that be used for sturcture reinforcement by spraying concrete to structure surface with gun sprayer.It is widely successfully used in mines, tunnels, and other civil engineering structures ect.. Two common preparation method of …

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212.3R Chemical Admixtures for Concrete

ACI 212.3R Chemical Admixtures for Concrete Reported by ACI Committee 212 (Reapproved 1999) ... 3. Wet- and dry-process shotcrete 3. Control of purchase 3. Batching and use 3. Proportions of concrete ... and accelerating), an admixture may be the only feasible means of …

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Shotcrete Technologies Inc. - Shot-Set 250 Accelerator

At a dosage rate of two to four percent by weight of the cement, petrographic, tests show no deterioration of "in-place" shotcrete after several years. The Shot-Set 250 Liquid Accelerator: Reduces rebound, normally to about five percent.

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SINTEF REPORT - Forskning, teknologi og innovasjon

Set accelerating admixture Admixture which decreases the time to commencement of transition of the mix from the plastic to the rigid state. Hardening accelerating admixture Admixture which increases the rate of development of early strength in the concrete, with …

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Accelerating admixtures for shotcrete

Accelerating admixtures for shotcrete Accelerators are being used increasingly in both dry- and wetprocess applications. Accelerators are common in the dry process to increase early strength and reduce dust and rebound and in the wet process are used to achieve rapid set and early strength.

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CRG | Concrete Admixtures

AD-TEK SA is a high performance alkali-free composite set and hardening accelerating admixture for shotcrete. AD-TEK SA is in accordance with Australian Standard AS1478.1 – 2000 as Special Purpose Accelerating Admixture.

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A Division of River Sands Pty Ltd Concrete Accelerators ...

Concrete Accelerators, Admixtures, Dry Shotcrete and Grouts for ... Delivery of shotcrete admixture ... solution to be less potent in accelerating the set of the shotcrete - as the active ingredient sits dormant in the base of an IBC. Anti-flocculation enables bulk storage on site

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A Division of River Sands Pty Ltd Concrete Accelerators ...

Concrete Accelerators, Admixtures, Dry Shotcrete and Grouts for ... Delivery of shotcrete admixture ... solution to be less potent in accelerating the set of the shotcrete - as the active ingredient sits dormant in the base of an IBC. Anti-flocculation enables bulk storage on site

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US6723163B1 - Concrete admixture - Google Patents

This invention relates to cementitious compositions and to accelerating admixtures for use therein, especially as shotcrete accelerators. Sprayed concrete or “shotcrete”, which is applied to substrates such as rock faces and tunnels by spraying must set very rapidly.

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ALKALI-FREE SHOTCRETE SET ACCELERATING ADMIXTURE ...

alkali-free shotcrete set accelerating admixture Description CHRYSO® Jet 910 AF is an alkali-free, high performance liquid shotcrete accelerator, specifically designed for wet-mix process.

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High early strength and set accelerating admixture - Mapei

High early strength and set accelerating admixture 02.12 AREA OF USE Cem is a cement powder which, when mixed with portland cement, gives rapid setting and high early strength. Cem is a modified variant which gives a longer open time or pot life. TECHNICAL CHARACTERISTICS Shotcrete Cem is mixed with normal cement, using a suitable mixing ...

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Ultrasound monitoring of the influence of different ...

The possible use of ultrasound measurements for monitoring setting and hardening of mortar containing different accelerating admixtures for shotcrete was investigated. The sensitivity to accelerator type (alkaline aluminate or alkali-free) and dosage, and accelerator–cement compatibility were evaluated.

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MasterSet AC 534 concrete set accelerating admixture

MasterSet AC 534 patented, ready-to-use, liquid admixture is formulated to accelerate time of setting and to increase early concrete strengths. MasterSet AC 534 admixture does not contain calcium chloride. Recommended uses: Reinforced, precast, pumped, flowable, lightweight or normal weight concrete and shotcrete (wet mix)

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Accelerating admixtures for concrete

Accelerating properties have been reported for the lower monocarboxylic acids (C1 to C4) and their salts (formic, acetic, propionic and butyric), while higher carboxylic acid homologes (>C4) are retarders [5].

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Accelerating admixtures for shotcrete - ResearchGate

A variety of additives and admixtures are added to shotcrete to improve strength, adhesiveness, cohesiveness, freezing/thawing and abrasion resistance characteristics, and reduce rebound.

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(PDF) Accelerating admixtures for concrete - ResearchGate

Accelerating admixtures affect the rates of reactions between cement and water to give an overall increase in the hydration rate. Thus, the use of accelerators in concrete provides a shortening of ...

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Shotcreting Admixtures - Accelerating and Waterproofing ...

DURASHOT - P / L DURASHOT is the range of Dura set accelerating and waterproofing shotcrete admixtures both inliquid and powder forms. They are sometimes finely modified to suit the particular brand of cementbeing used at site.

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ASTM-C494 | Standard Specification for Chemical Admixtures ...

This specification covers the materials and the test methods for use in chemical admixtures to be added to hydraulic-cement concrete mixtures in the field.

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SHOTCRETE SET ACCELERATING ADMIXTURE - MARMOLINE – …

shotcrete set accelerating admixture Description CHRYSO® Jet RS 60 is a high performance shotcrete accelerator, based on sodium aluminate and specifically designed for wet-mix process.

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Shotcrete - Concrete Repairing Techniques | CivilDigital

Lack of air entrainment may lead to dry mix shotcrete having lower than desired freeze-thaw resistance. Wet mix shotcrete should be proportioned to contain 6 to 8 percent entrained air. It is sometimes desirable to use accelerating admixtures in shotcrete where rapid setting or rapid strength development is required.

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Tunnelling - Shotcrete Additives | Maccaferri Corporate

Tunnelling – Shotcrete Additives . Rocksil. Rocksil is an accelerating and hardening admixture for shotcreting works. It is based on a soldium silicate-in-water solution. Rocksil is easy to use and proven within tunnelling applications. It is suitable for use in both wet and dry mix shotcrete and provides faster setting times to shotcrete for ...

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Concrete Admixtures | Nordisk Aluminat A/S

Set Accelerating Admixtures. Set accelerating admixtures are best defined as those which, when added to concrete, mortar or paste, increase the rate of hydration of hycraulic cement, shorten the time of setting and increase the rate of early strength development.

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Admixtures for Shotcrete | Sika (Thailand) Ltd.

Admixtures for Shotcrete. Sika® Sigunit® LS. Liquid Shotcrete Accelerator. Use. Sigunit® LS is used for accelerating the set of dry or wet sprayed concrete mixes. The main fields of applications are: Temporary support in underground constructions excavated by the traditional method (NATM)

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US6723163B1 - Concrete admixture - Google Patents

This invention relates to cementitious compositions and to accelerating admixtures for use therein, especially as shotcrete accelerators. Sprayed concrete or “shotcrete”, which is applied to substrates such as rock faces and tunnels by spraying must set very rapidly.

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Shotcrete Admixture

Shotcrete Admixture Product data sheet Edition 06.2009 CSC Master FormatTM Sigunit® P1AF Provisional Data Sheet description Sigunit® P1AF is a water-soluble, alkali free and high-performance shotcrete accelerator in powder form. When dissolved in water it produces an alkali free set accelerator for wet sprayed shotcrete.

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Ha-Be: Concrete Admixtures - Accelerators

Chloride-free accelerating and antifreeze admixture ANTIPOR® quick is a chloride free accelerator for producing concrete at low ambient temperatures. MORE INFORMATION

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Water Reducing Admixture for Shotcrete Applications

used whenever high quality and high strength shotcrete applications are required. Sika ViscoCrete SC can be combined with retarding admixtures such as Sika-Tard 930 or shotcrete accelerating admixtures to achieve the required compres-sive strengths and setting characteristics.

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ADMIXTURES FOR SHOTCRETE - American Concrete Institute

SHOTCRETE ADMIXTURES ACCRETE is a set accelerating and waterproofing adrnixture designed for use with shotcrete. There is an added advantage in that this admixture will assist in the reduction of rebound from the sprayed surface. The primary reQuirement of the engineer's specification for

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WO1998037980A1 - Set modifying admixtures for refractory ...

A wet-mix refractory shotcrete process generally consists of thoroughly mixing a refractory material and water to produce a pumpable mixture. The mixture is then introduced into a delivery hose, and moved by pumping or conveying by compressed air to a dispensing (i.e., spraying) nozzle.

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Admixtures - Euclid Chemical

Masonry/MCP Admixtures. Euclid Chemical provides a range of admixtures to meet the needs of the block, paver, roof tile, hollow core slab and dry-cast pipe producers. These products are used to improve the production efficiency, performance, and visual appeal of machine-made concrete products.

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Accelerating Admixtures for Shotcrete | Concrete | Sodium

Accelerating Admixtures for Shotcrete - Download as PDF File (.pdf), Text File (.txt) or read online.

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Alkali free powder shotcrete accelerating admixture

Alkali free powder shotcrete accelerating admixture Product Description Sigunit ® AF is a non-toxic, alkali-free accelerator in powder form for shotcrete (in the dry spray process). Uses Sigunit® AF is suitable for use as an accelerator in the dry spray process. The main uses of Sigunit® AF are: Shotcrete with high initial strength

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Admixtures | MegaAdd CI Liquid Corrosion | MSASA

Shotcrete Accelerating Liquid Admixture. MegaAdd SAL is a rapid set accelerator in liquid form for cementitious mixes. It is used as an additive in mixes to enable rapid setting of sprayed concrete and gunite for tunnel lining, water bodies, dams, swimming pools, basement retaining walls and …

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