Cold Weather Shotcreting American Shotcrete Association

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Cold-Weather Shotcreting: Protect shotcrete work from physical damage or reduced strength caused by frost, freezing, or low temperatures according to ACI 306.1 and as follows: Discontinue shotcreting when ambient temperature is 40 deg F and falling.

Guide to Shotcrete - American Concrete Institute

saw the generic term “shotcrete” introduced by the American Railway Engineering Association to describe the Gunite process. In 1951, the American Concrete Institute adopted the term “shotcrete” to describe the dry-mix process. It is now also applied to the wet-mix process and has gained widespread acceptance in the United States and ...

Cement Standards and Concrete Standards

ASTM's cement and concrete standards are instrumental in the evaluation and testing of concrete, cement, and aggregates. Concrete can have different properties depending upon the mixture that is used in creating it, which contains cement, chemical admixtures, and aggregates.


ACI 306R-10 – Guide to Cold Weather Concreting. ACI 308.1-11 – Specification for Curing Concrete. ACI 309R-05 – Guide for Consolidation of Concrete. ACI 506R-16 – Guide to Shotcrete. ACI 506.2-13 – Specification for Shotcrete. American Society of the International Association …


STRUCTURAL DESIGN 2012 MYANMAR NATIONAL BUILDING CODE 1 SECTION 3.1 GENERAL 3.1.1 Definitions and Notation Definitions The following words and terms shall, for the purposes of this PART, have the meanings

Cold Weather Concreting - Portland Cement Association

The current American Concrete Institute (ACI) definition of cold-weather concreting, as stated in ACI 306 is, “a period when for more than three successive days the average daily air temperature drops below 40 degrees Fahrenheit and stays below 50 degrees Fahrenheit for more than one-half of any 24 hour period.”

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Delaminations in Concrete Slabs

Compared to slabs cast on a porous subbase, the bleed water quantity will be greater and bleed time may be longer, especially in cold weather. Don't place concrete on cold subgrades when ground temperatures are below 40°F. The cold ground slows setting of the bottom part of the slab, making the timing of finishing even more difficult to judge.

Be Sure to Cure a Shotcrete Pool

does permit shotcreting duri n g cold weather when the ambient t e m p e ra t u re is 40°F and rising. Also monitor the shotcrete tem-p e ra t u re during cold we a t h e r, since it should fall within the specifica-tion limits of 50°F to 90°F. The spec-Placing a weep hose on the bond beam is …

117-06 Specifications for Tolerances for Concrete

Commentary synopsis: This report is a commentary on the Specifications for Tolerances for Concrete Construction and Materials (ACI 117). It is intended to be used with ACI 117 for clarity of interpretation and insight into the intent of the committee regarding the application of the tolerances set forth therein.


ACI 506 Recommended Practice for Shotcreting ACI 506.2 Specification for Materials, Proportioning and Application of Shotcrete American Welding Society AWS D1.1 Structural Welding Code AWS D1.4 Structural Welding Code - Reinforcing Steel AWS D12.1 Reinforcing Steel - Welding Code American Association of State Highway Officials

Cold Weather Concrete Take precautions and follow

Cold Weather Concrete Subhead: Take precautions and follow guidelines to help ensure success EXAMPLE: Weather is a key factor in the placement of concrete and shotcrete because it affects how quickly the material matures and gains strength. Cement hydration is an exothermic reaction; that is, it gives off heat. In hot weather, concrete stiffens quickly, especially when the concrete temperature ...

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Committed to construction industry growth and technology leadership . The technical experts at BASF are widely respected in the construction industry, actively leading and participating in key associations, on committees, at seminars and panels.

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ADDENDUM 3 - Duluth, Minnesota

C. Hot-Weather shotcreting: Mix, place, and protect shotcrete according to ACI 305R when hot-weather conditions and high temperatures would seriously impair quality and strength of shotcrete, and as follows: 1. Cool ingredients before mixing to maintain shotcrete temperature at time of placement below

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CIP 27 - Cold Weather Concreting

2006-02-24 · CIP 27 - Cold Weather Concreting WHY Consider Cold Weather? WHAT is Cold Weather? Cold weather is defined as a period when the average daily temperature falls below 40°F [4°C] for more than three successive days. These conditions warrant spe-cial precautions when placing, finishing, curing and

ACI 306.1 - Standard Specification for Cold Weather

This Standard Specification covers requirements for cold weather concreting and protection of concrete from freezing during the specified protection period. The provision of this Standard Specification shall govern unless otherwise specified in the Contract Documents.

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UNIFIED FACILITIES GUIDE SPECIFICATIONS References are in agreement with UMRL dated January 2020 ***** SECTION 03 37 13 SHOTCRETE 02/18 ***** NOTE: This guide specification covers the requirements for materials, proportioning, application, and curing of shotcrete. Adhere to UFC 1-300-02 Unified Facilities Guide Specifications (UFGS) Format ...


UINTA BASIN REPLACEM ENT PROJECT BIG SAND WASH DAM EN LARGEMENT CVO/169897A OCTOBER 29, 2003 03361 1 SHOTCRETE SECTION 03361 SHOTCRETE PART 1 GENERAL 1.1 REFERENCES A. The following is a list of standards which may be referenced in this section: 1. American Concrete Institute (ACI): a. 506, Recommended Practice for Shotcreting.

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CIP 27

Cold weather concrete temperature should not exceed these recommended temperatures by more than 20°F [10°C]. Concrete at a higher temperature requires more mixing water, has a higher rate of slump loss, and is more susceptible to cracking. Placing concrete in cold weather provides the opportunity for better quality, as

Technical Questions and Answers Archive

“3.4.5 Cold weather shotcreting—Unless otherwise specified, shooting may proceed when ambient temperature is 40°F and rising. Stop shooting when ambient temper­ature is 40°F and falling, unless measures are taken to protect the shotcrete.

Cold weather protection shall be maintained until the compressive strength of the shotcrete is greater than 725 psi. Cold weather protection includes blankets, heating under tents or other means acceptable to the Engineer. The temperature of the shotcrete mix, when deposited, shall be not less than 50°F or more than 85°F.

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