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All mixes are performance based using type GU Po rtland and supplementary cementitious products. CBM reserves the right to increase prices due to project type and / or volume requirements. Prices are in effect starting January 1, 2024.
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All mixes are performance based using type GU Portland and supplementary cementitious products. CBM reserves the right to increase prices due to project type and / or volume requirements. January 1, 2024
CBGM (cement bound granular material) is a cost effective way to build a heavy duty, durable pavement – fast. It offers an alternative to more traditional flexible materials (ie AC HDM). The binder can be rapid setting like cement or slow setting like PFA and slag. HBMs can be used in road foundations (as a stronger alternative to traditional ...
- Understanding Prescriptive-Based and Performance-Based Concrete Specifications
- Prescriptive Specifications Impede Sustainability Efforts
- The True Extent of Overly Prescriptive Specifications
- The Shift to Performance-Based Specifications
- More Efficient, Low Carbon Concrete with Performance-Based Specifications
Traditionally, the AEC community relied on prescriptive specifications for concrete mix designs. Prescriptive specifications include clauses for the methods of construction and impose restrictions on the compositional parameters of concrete mix. For example, prescriptive specifications may prescribe a minimum cement content of 700 lb/yd3 (415 kg/m3...
Prescriptive specifications are often overly conservative, which can lead to higher costs, negative results, and poorer sustainability. Examples of prescriptive requirements include: 1. Limitations on source and composition of materials 2. Minimum cement factors 3. Limitations on supplementary cementitious materials (e.g. quality, type, composition...
Recently, the National Ready Mix Concrete Association(NRMCA) surveyed 102 project specifications to identify the true extent of prescriptive limitations. They found the most common prescriptive requirement to be a restriction on the amount of supplementary cementitious material (SCM) that can be used in concrete — 85% of specifications contain this...
Dr. Thomas described his first experience convincing a client to move from prescription-based to performance-based specifications in the mid-1980s. He worked on a cooling tower project where the prescriptive specification for the concrete had a minimum Portland cement content and a limitation that fly ash and slag could not be used. “There was a co...
According to Dr. Thomas, prescriptive specifications are outdated and prescribed for scenarios that are no longer relevant today. Instead, he recommends the following ways to minimize prescriptive-based specifications and drive innovation in concrete mix design: 1. Don’t Include Minimum Cement Quantities “There is a perception that more cement make...
ConcreteSolutions. ConcreteSolutions. The Right Solutions for the Right Project. CBM Concrete Solutions are specially formulated to provide solution s to your specific project needs. u0003Simply click to view our complete list or learn u0003more about an individual product below. Visit the CBM ConcreteSolutions microsite for full details. .
Excess water can cause segregation in the mix and deterioration of the surface as well as reduced concrete strength. CBM’s EasyFlow ready-mixed concrete saves you time placing, screeding and finishing flatwork resulting in a better, smoother surface without adding water. Finishers will immediately notice the improved troweling characteristics.
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Mar 10, 2023 · At the same air void content, CGB mixes with high-performance cement paste had higher fluidity and higher volume of cement mortar when compared to CGB mixes with pure cement paste. With the increase in fluidity and volume, the quantity of grout penetration will be higher which results in higher rigidity of the mixture [8] .
