Month: July 2026

The main sand and gravel system parent rock is limestone in four material yards: Xinyan, Huajie, Machangping, and Xinjie; There are five material yards with dolomite as the parent rock: 771, Xiangyuan, Madaobian, Lubi, and Wujiayuan.

The experiment mainly conducted a relationship test between methylene blue and mud content in six sand and gravel production sites, established a formula for the relationship between methylene blue and mud content, calculated the mud content of the sand from it, and calculated the cost of water reducer per cubic meter of concrete based on the different dosage of water reducer used for different mud contents.

Double Ended Ferrule

In addition, a comparative experiment was conducted on the water reducing agent dosage between the medium stone backfilled sand (medium stone backfilled sand with relatively low mud content) and ordinary machine-made sand (produced from ordinary raw materials) in the Ma Dao Border Material Yard; Conduct comparative tests on the addition of water reducing agents and compressive strength results of different methylene blue sands in the new rock material yard using the same concrete mix ratio.

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In the field of modern construction engineering, concrete is one of the most widely used structural materials, and its strength directly affects the safety, durability, and service life of the structure.

Lifting Anchor

Accurately measuring the strength of concrete has become a key link in ensuring engineering quality.

At present, there are many methods for testing the strength of concrete, and the rebound method has been widely used in practical engineering due to its non-destructive, convenient operation, and ability to quickly detect structures that have reached their age.

However, due to the susceptibility of rebound method to various external factors, there may be certain errors in the detection results, which in turn affects the accurate evaluation of engineering quality.

Under the trend of constantly pursuing high quality and precision in the construction industry, it is of great practical significance to deeply analyze the accuracy and influencing factors of rebound method in detecting concrete strength, in order to improve the accuracy of rebound method detection and ensure the reliability of engineering quality evaluation.

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The Minzhi Commercial Center project supplied by our company consists of 4 towers as the main building, of which 3 towers have C70 high-performance concrete for the outer frame columns below the 30th floor.

The total construction area of the project is 81488m2, with 4 basement floors and C70 high-performance concrete for the outer frame columns from the basement to the 30th floor.

The design life of the project is 100 years.

Fixing Socket

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According to data analysis from the National Bureau of Statistics, from January to May 2026, the cumulative output of key products in the concrete and cement products industry has both decreased and increased.

Among them, the cumulative production decline of commodity concrete and cement drainage pipes has expanded compared to January April, the cumulative production decline of concrete poles has narrowed compared to January April, the cumulative production decline of precast concrete piles has remained the same compared to January April, and the cumulative production growth rate of cement pressure pipes has changed from negative to positive, with a significant increase.

Crown Foot Anchor

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Cement production is one of the important sources of global CO ₂ emissions, and the development of sustainable concrete materials is of great significance for reducing carbon emissions.

Floating stone concrete can improve its durability while reducing environmental burden by adding floating stones to replace some of the cement used.

However, the mix design of pumice concrete involves the interaction of multiple materials, and predicting the 28 day compressive strength faces challenges.

Traditional empirical formulas have limited accuracy, and although machine learning models can improve prediction accuracy, a single algorithm has shortcomings in generalization ability.

Steel Chamfer

This study constructed a hybrid ensemble learning model based on grey wolf optimizer to achieve high-precision prediction of compressive strength of pumice concrete, and provided interpretable engineering insights through SHAP analysis.

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Sulfate corrosion is one of the main factors leading to a decrease in the durability of concrete structures.

After being corroded by sulfate, concrete usually undergoes deterioration phenomena such as expansion, cracking, and peeling.

Rebar Bolsters

The corrosive sulfate ions react with cement hydration products to produce gypsum and ettringite, leading to volume expansion and internal damage.

This study uses copper slag as an auxiliary cementitious material to replace some cement, and systematically evaluates its impact on the sulfate resistance of concrete.

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Cement production emits a large amount of CO ₂ (approximately 0.

6-1.

0 tons per ton of cement), making it a carbon intensive process.

Replacing some cement with auxiliary cementitious materials (SCMs) is an effective way to reduce carbon emissions.

Precast Lifting Clutch

Commonly used SCMs include fly ash, silica fume, and granulated blast furnace slag, but these industrial by-products also emit CO ₂ during the production process.

In recent years, rice husk ash (RHA) has received widespread attention as a source of agricultural waste SCMs.

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The cement and concrete industries are important sources of carbon emissions, and achieving the dual carbon goals poses an urgent requirement for the sustainable development of the construction industry.

Industrial solid waste, as a concrete admixture or aggregate substitute material, can effectively reduce natural resource consumption and solid waste storage, and has significant carbon emission reduction benefits.

Lithium slag is a byproduct of lithium salt extraction process, with approximately 10 tons of lithium slag produced for every 1 ton of lithium salt produced.

Its resource utilization is of great significance for environmental protection.

Existing research has focused on the application of lithium slag in cement-based materials, but systematic research on the durability of lithium slag based concrete is still lacking.

This study prepared C50 and C60 graded solid waste concrete and systematically studied its durability, ecological safety, and carbon emission benefits.

Concrete Lifting Clutch

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Traditional high-strength concrete requires a large amount of cement and has high carbon emissions, posing challenges to the sustainable development of the construction industry.

Steel Chamfer

Industrial solid waste as a concrete admixture instead of cement can effectively reduce carbon emissions and minimize solid waste storage.

CWP has a high annual output and low resource utilization rate; GP has volcanic ash activity; GWP has a micro aggregate filling effect.

This study systematically investigated the influence of three types of solid waste materials with high content replacing cement on the mechanical properties and durability of HSC.

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The characteristics of high-performance concrete are the use of low water cement ratio, the selection of high-quality raw materials, and the addition of mineral admixtures and high-efficiency additives.

Double Ended Ferrule

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