Resources / Concrete

The National Ready Mixed Concrete Association (NRMCA) has provided a list of Concrete in Practice informational guides. The following guidelines explain a variety of issues or questions contractors may encounter when placing concrete.

Dusting Concrete Surfaces

Avoid or fix the concrete dusting by following these simple rules.

Scaling Concrete Surfaces

Read over these guidelines to protect your concrete from scaling.

Crazing Concrete Surfaces

Prevent concrete surface crazing by following these guidelines here.

Cracking Concrete Surfaces

This guide includes information on cracks and tips on how to avoid them.

Plastic Shrinkage Cracking

Plastic shrinkage cracking occurs while the fresh concrete is still drying. Read over these guidelines to prevent plastic shrinkage cracking.

Joints in Concrete Slabs on Grade

Unfortunately, crack free concrete is impossible. Putting joints in your concrete is a way of controlling where they go.

Cracks in Concrete Basement Walls

Use this guide to ensure that your basement walls are up to standard.

Discrepancies in Yield

Over or underestimating the amount of concrete you need for a project can happen. This guide will help you when ordering concrete.

Low Concrete Cylinder Strength

High cylinder strength is essential to a successful project. This guide will explain cylinder strength.

Strength of In-Place Concrete

In certain situations, you must be able to test the strength of concrete that is already in place. This guide will explain why and how to complete the process.

Curing In-Place Concrete

In order to maximize the strength and durability of your concrete, you must cure it. This guide offers helpful tools on how to maximize that strength and durability.

Hot Weather Concreting

An explanation of how hot weather can damage your project.

Concrete Blisters

This guide provides a list of instances when blisters occur most, as well as how to prevent them.

Finishing Concrete Flatwork

An explanation of different surfaces of concrete and how to finish them.

Chemical Admixtures for Concrete

This guide explains the what, why and how when using chemical admixtures in concrete.

Flexural Strength of Concrete

The flexural strength tells us how well your concrete resists bending. Use this guide for technical information on flexural strength of concrete.

Flowable Fill Materials

Use this guide to see if this cost-effective material is a good solution for your project.

Radon Resistant Buildings

Keep your family or employees healthy by ensuring you’re building a radon-resistant building. For more information about this radioactive gas in your soil, click here.

Curling of Concrete Slabs

This guide will help you understand the effects of temperature and moisture on concrete curling.

Delamination of Troweled Concrete Surfaces

Delamination can occur when you attempt to finish the concrete too soon. Learn more about this blister-like complication here.

Loss of Air Content in Pumped Concrete

This guide will explain how air loss can occur when pumping concrete.


Learn how to specify and test grout by clicking here.


Concrete discoloration is usually the result of a number of factors. Learn about those, as well as how to treat it, within this guide.

Synthetic Fibers for Concrete

Adding synthetic fibers to concrete offers a slew of benefits, including added internal support and greater resistance to cracking. Read more about synthetic fibers here.

Corrosion of Steel in Concrete

Corrosion of steel in concrete can damage the integrity of your project, leaving it weak and delaminated. Learn about its causes and prevention here.

Jobsite Addition of Water

If additional water is needed to increase the slump of your concrete, this can be done on the jobsite. Please read this guide to be sure you are aware of the risks sometimes associated with doing this.

Cold Weather Concreting

While freezing temperatures can really hurt your plastic concrete, there are benefits to laying it in cooler weather. Read on for more details.

Concrete Slab Moisture

Moisture on the surface of your concrete slab can cause trouble covering the concrete with carpet and the like. Find out where your slab moisture might be coming from and how to avoid it.

Vapor Retarders Under Slabs on Grade

If moisture is able to pass through your concrete slab, it can cause problems such as odors and discoloration of the materials laid above it, like tile or carpet. Experts use vapor retarders to avoid this problem.

Supplementary Cementitious Materials

Materials can be added to your concrete to make them more durable, strong and easy to work with. They’re called supplementary cementitious materials and you can learn more about different types and uses by clicking here.

Ordering Ready Mixed Concrete

When you’ve planned out your project and are ready to order your ready mixed concrete, check out these guidelines and suggestions.

Concrete Pre-Construction Conference

Holding a meeting before the pour is especially important for contractors and their teams. Read on for subjects we suggest you cover at your pre-construction conference.

High Strength Concrete

High strength concrete is used for specific projects, such as building high-rises, that have certain needs. For more examples of projects as well as how to design a high-strength mixture, read this guide.

Making Concrete Cylinders in the Field

To test the strength of your concrete, you must make a concrete cylinder from the same pour that you are using for your project. Read this guide for instructions on how to make one.

Testing Compressive Strength of Concrete

In order to be certain that your concrete meets the requirements of your project, it’s important to test its compressive strength. This guide will show you how.

Structural Lightweight Concrete

Structural lightweight concrete is used primarily to decrease the dead load of your project, so that the size of certain elements can be reduced. For additional specifications, read on.

Self-Consolidating Concrete (SCC)

For a concrete that can spread into place on its own and doesn’t segregate, look into using self-consolidating concrete, or SCC. Read this guide for more of its properties and situations where its use is appropriate.

Pervious Concrete

Pervious concrete is a special kind that lets water and air pass through and into the ground, making it more sustainable and better for the environment. For more information on this unique concrete and to see if it would be a good choice for your project, read on.

Maturity Methods to Estimate Concrete Strength

Using maturity methods to estimate the strength of your concrete is a more reliable method than using concrete cylinders. This document explains their function and benefits.

Aggregate Pop-outs

Learn the causes of unappealing aggregate pop-outs in your concrete, as well as how to prevent or repair them, with this guide.

Acceptance Testing of Concrete

To be certain that the concrete is up to the standards of the buyer, acceptance testing must be performed. Read more about why and how.

Thermal Cracking of Concrete

Thermal cracking happens when there are major differences in temperature within your concrete project or the surrounding area. The conflicting temperatures cause contraction and expansion, cracking the concrete. Learn prevention and repair tips here.