1.
Code for Acceptance of Construction Quality of Concrete Structures GB20504-2015.
Month: October 2025
Sustainable Geopolymer foam Concrete and Recycled Rubber Debris and Dual Fiber Reinforced Polypropylene and Glass Fiber
Foam concrete is widely concerned because of its excellent performance of heat insulation, fire prevention, sound absorption and low density.
Conventional foam concrete uses ordinary Portland cement (OPC) as the binder, but the energy consumption of cement production is high.
Each ton of cement emits about 0.
85 tons of CO ₂, accounting for nearly 8% of global anthropogenic CO ₂ emissions.
Geopolymer foam concrete (GFC) combines the lightweight and thermal insulation characteristics of foam concrete and the environmental protection and high-performance characteristics of alkali activated bonding system, and uses industrial by-products such as fly ash (FA) as the main binder to significantly reduce greenhouse gas emissions.
.
This is the right way to deal with issues such as honeycomb, rough surface, exposed reinforcement, cracks, and missing corners!
During the structural construction process, the project department often discovers varying degrees of quality problems on the construction site, including slag inclusion in construction joints (floor slabs), exposed steel bars, concrete honeycombs, rough surfaces, missing edges and corners, floor cracks, and uneven door and window openings.
.
Should the design consider the mandatory construction allowable deviation for the minimum thickness of the steel reinforcement protective
In reinforced concrete structures, the minimum requirement for the thickness of the steel reinforcement protective layer has always been specified.
However, designers determine the thickness according to design standards, and construction and acceptance determine whether the thickness is qualified by applying the allowable deviation in the acceptance specifications based on the design values.
It seems that there is nothing wrong with this.
However, the “General Code for Concrete Structures” (GB 55008-2021) implemented on April 1, 2022, as a requirement that runs through the entire process, clearly states that “the survey, design, construction, acceptance, maintenance, curing, demolition and other construction activities of engineering construction projects must be strictly implemented throughout the entire process.
” The mandatory requirement for the thickness of the steel reinforcement protective layer is:.
[Case 3-12] Commercial concrete pavement quota 3-13 Usage of slab culvert quota
Concrete.
For a first-class highway, the pavement structure form and quantity are shown in the table below.
Water stabilized materials and concrete are commercial water stabilized materials and commercial concrete.
Key points of quality control technology for autumn concrete construction
The dry climate and large temperature difference between day and night in autumn bring a series of challenges to concrete construction, such as changes in setting time, early plastic shrinkage, and temperature stress.
To ensure the physical quality and long-term durability of concrete engineering during this season, it is necessary to implement refined control throughout the entire process of raw materials, production, construction, and maintenance.
.
Conventional C10, C15, C20, C25, C30 concrete mix proportions
The strength standard value is a value in the overall distribution of cubic compressive strength, and the percentage of strength below this value does not exceed 5%, which means there is a 95% guarantee rate.
The strength of concrete is divided into twelve grades: C7.
5, C10, C15, C20, C25, C30, C35, C40, C45, C50, C55, C60, etc.
.
China Construction Western Construction’s Top 10 Concrete Production Plants in October List Released
① The copyright of all original content on this account is exclusively owned by “Concrete and Cement Products Network”.
Any media, website, or individual who reposts or uses it must obtain written authorization from the account.
Violators will be held responsible by this website in accordance with the law.
.
Deep analysis of the top ten application scenarios and hard standards for concrete and asphalt
Concrete and asphalt are the ground foundation materials for various living, leisure, and sports venues.
The requirements and standards for concrete or asphalt foundations vary greatly depending on the purpose of the venue, which determines the safety, durability, user experience, and cost of the venue.
.