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Learn more about Bing search results hereOrganizing and summarizing search results for you- Accuracy of the pressure air meter (ASTM C 231)
- Accumulation of air voids at the coarse aggregate surface
- Excessive loss of air volume in transit or in pumping
- Need for greater precision and detail in specification requirements for air-entrained concrete
- Increased probability of delamination or blistering when hard-troweling air-entrained concrete
- Reduction in surface air content when hard-troweling air-entrained concrete
- Change in hardened air void parameters when hard-troweling air-entrained concrete
- Poor durability and much greater vulnerability to the internal pressures caused when moisture in concrete freezes and expands when there is no or low air entrainment in exterior concrete exposed to freeze-thaw conditions
- Devastating consequences to the appearance of stamped concrete when there is freeze-thaw damage.
The American Society of Mechanical Engineers - ASMEhttps://asmedigitalcollection.asme.org › cementconcreteaggregates › article › Some-Recent-Problems-with-Air-Entrained-ConcreteSome Recent Problems with Air-Entrained ConcreteSeveral problems are identified in regard to air-entrained concrete, which include the accuracy of the pressure air meter (ASTM C 231), the accumulation of air voids at the coarse …HPD CONSULThttps://www.hpdconsult.com › air-entrained-concreteAir Entrained Concrete Admixture | Air Entrained Concrete Problems ...Some specifications require concrete contractors to hard-trowel air-entrained concrete. The risks associated with this requirement include: increased probability of delamination or…Concrete Networkhttps://www.concretenetwork.com › concrete › concrete_admixtures › air-entrainers.htmlAir-Entrained Concrete Improves Freeze-Thaw Durability - Concrete NetworkNo or low air entrainment in exterior concrete exposed to freeze-thaw conditions will result in poor durability and much greater vulnerability to the internal pressures caused when… Air Entrained Concrete: What is it. When to …
Jun 29, 2022 · Deciding on an air entrained or non-air concrete mix can usually be answered with two easy questions. Is the surface of the concrete going to be exposed to the elements …
Some designers specify air-entrained concrete for interior floors subject to a few freeze-thaw cycles during construction. But be aware that this shifts the risk of surface damage from the …
What Are Common Problems with Air …
How Can We Overcome the Common Problems with Air Entrained Concrete? Air entrained concrete, while beneficial for certain applications, presents several challenges that need …
Common Concrete Problems and How to …
Aug 16, 2024 · Use air-entrained concrete, which contains tiny air bubbles that allow water to expand during freezing. Avoid using de-icing salts on new concrete for at least the first winter. …
If the concrete is not going to be exposed to freezing and thawing cycles, then air entrainment should not be specified or used. Sometimes contractors order “half air” or approximately 3% …
Some Recent Problems with Air-Entrained Concrete
Several problems are identified in regard to air-entrained concrete, which include the accuracy of the pressure air meter (ASTM C 231), the accumulation of air voids at the coarse aggregate …
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Finishing air-entrained concrete requires a light touch
Jul 27, 2021 · When finishing air-entrained concrete, less is more. Hard-troweled surfaces and air-entrained concrete don’t mix. If you need to entrain air— that is, if the concrete will experience cycles of freezing and thawing while wet—you …
Some Recent Problems with Air-Entrained Concrete - ASTM …
Several problems are identified in regard to air-entrained concrete, which include the accuracy of the pressure air meter (ASTM C 231), the accumulation of air voids at the coarse aggregate …
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Concrete Q&A
It’s typical to get between 1.8 and 2.2% entrapped air in non-air-entrained concrete, but 3% is the industry standard maximum “total air” recommended to be troweled. While 3% is not a magical …
Air-Entrained Concrete Improves Freeze-Thaw …
Mar 28, 2023 · The simplest way to avoid these problems is to add an air-entraining admixture to your concrete mix. Depending on the exposure conditions in your area, you should aim for an air content of about 4% to 7%, or as …
Air Entrained Concrete Admixture | Air Entrained Concrete …
Jun 17, 2021 · Air Entrained Concrete Problems. Some specifications require concrete contractors to hard-trowel air-entrained concrete. The risks associated with this requirement include: …
Fallacies and Misconceptions Related to Air Entrained …
Oct 4, 2019 · Entrained air can affect a multitude of concrete properties in both the fresh and hardened state. A common misconception exists that air entrainment is required simply because a vertical concrete...
Finishing air entrained concrete 3 - Eng-Tips
Apr 22, 2011 · The main problem with troweling an AE concrete is that the troweling activity vibrates the concrete, raising air bubbles and water upward towards the surface while at the …
Air Entrainment in Concrete - ARIZCC
Oct 5, 2021 · The concrete industry has developed air-entrainment admixtures to solve this expansion problem to create tiny microscopic bubbles in the concrete. If the concrete is above …
Factors Affecting Concrete Air Entrainment – TB-0200
Aug 9, 2017 · Some of these factors and their effects are summarized below. An increase in the surface area (or fineness) of cement will decrease the air content. A high cement factor …
What Factors Affects Air Content of Concrete?
Concrete air entrainment is not an easy process since it is influence by several factors. These factors shall be properly investigated to be able to obtain designated air entrainment. 1. Effects …
Solving Problems with Air Entrained Concrete #WE125
Dec 12, 2024 · Problems with air-entrained concrete can be frustrating, time-consuming, and expensive. Some of these include measuring air at the chute vs. point of placement, hot vs. …
Q1: Does high performance concrete (HPC) need to be air entrained for frost resistance? A1: The primary purpose of air entrainment in concrete is to improve concrete’s resistance to cycles of …
Why Is My Concrete Breaking Up? Common Causes and …
A study found that 50% of concrete deterioration stems from overlooked structural problems (source: National Ready Mixed Concrete Association). ... get air-entrained concrete that …
The effect of air content on concrete strength
How does air content affect strength? A. Intentionally entrained air voids improve the resistance of concrete to damage from cycles of freezing and thawing. Any air voids reduce the strength of …
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