1、 The compliance of concrete test block curing is a key link in engineering quality control, and the curing standard curing test blocks of commercial mixing stations do not meet the requirements of the specifications.
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precast-tech
precast-tech
Sending Coolness in the Heat of Summer, Concentrating to Ensure Contract Fulfillment | Our Company Goes to Various Cooperation Projects to
After the onset of summer, Xi’an continued to experience high temperatures and heat waves, with scorching sun for several days, and the surface temperature at the construction site remained high.
Each ongoing project is striving to seize the golden construction period.
Project management personnel and frontline construction workers are not afraid of the scorching heat, sticking to the front line of work, racing against time to advance construction nodes, and using sweat to ensure the orderly implementation of project construction.
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Systematic study on rheological properties of alkali activated materials during 3D printing process: influence of precursor properties
3D printed concrete has high requirements for the early age rheological properties of materials.
The materials need to have sufficient fluidity during pumping and extrusion stages, as well as quickly restore structural strength after deposition to ensure stability during layer by layer stacking.
Alkali activated materials are considered an important development direction for 3D printing cement-based materials due to their advantages of low carbon, early strength, and the ability to utilize industrial by-products.
However, the rheological behavior of alkali activated materials is significantly affected by the type of precursor, especially the properties such as static yield stress, thixotropy, and viscosity recovery, which directly determine their printability and constructability.
Therefore, it is necessary to systematically study the influence of different precursors on the rheological properties of 3D printed alkali excited materials.
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Industry Data: Import and Export of Concrete Mixing Machinery from January to May
Source: China Chamber of Commerce for Import and Export of Mechanical and Electrical Products.
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June 2026 National Pre mixed Concrete (Commercial Concrete) Industry Market Survey Report: Demand bottoming out in the off-season, rigid
[Explanation] This article provides macro data on the total production of commercial concrete in China, regional operating rates, mainstream transaction prices, full chain costs, capacity utilization rates, and industry average payments, all of which are sourced from the National Bureau of Statistics, industry associations, and authoritative monitoring platforms and can be cross verified; Doubtful information: Daily production and sales ledger of single commercial concrete stations, exclusive customized procurement prices for enterprises, non-standard sub division delivery prices for districts and counties, precise material costs for individual projects, without official public disclosure of sub division standards.
All segmented data in this article are the national authoritative sampling mean, with individual, regional, and individual biases.
They are only used for industry macro trend analysis and cannot be directly used as the sole basis for single site bidding pricing, accurate cost accounting, and performance evaluation.
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Literature Review | Overview of Concrete Abrasion Damage and Protective Measures in Hydraulic Structures
Hydraulic structures are subjected to the erosion and wear caused by sand carrying water flow, resulting in continuous loss of concrete surface materials.
The abrasion damage affects the durability and safety of hydraulic structures, and the systematic study of concrete abrasion mechanisms and protective measures is of great significance for the long-term operation of hydraulic structures.
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Literature Review | Study on Self Strain Sensing of Nano Carbon Black Modified Ultra High Performance Concrete
Concrete is one of the most widely used building materials, and its production consumes a large amount of natural resources such as fresh water and river sand.
According to the statistics of the World Health Organization, the shortage of water resources has affected more than 2 billion people, and the annual mining output of river sand is up to 5 billion tons.
Over exploitation has caused serious damage to the river ecosystem.
At the same time, ultra-high performance concrete (UHPC) has become a representative of the new generation of high-performance building materials due to its ultra-high mechanical properties, low porosity, and excellent durability.
In recent years, the application of seawater and sea sand in the preparation of UHPC has attracted widespread attention, but traditional UHPC does not have self sensing function, making it difficult to meet the intelligent needs of marine structural health monitoring.
This study prepared nCB UHPSSC with excellent mechanical properties and self strain sensing ability by incorporating nCB as a conductive filler into ultra-high performance seawater sand concrete, providing a new approach for self sensing concrete in marine structures.
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Literature Express | Dynamic and Static Splitting Behavior of Basalt Fiber Reinforced Geopolymer Concrete in Marine Sulfate Environment
Marine engineering structures bear both static and dynamic loads, and the durability of concrete is particularly prominent in sulfate attack environments.
Sulfate ions react with cement hydration products to produce expansion products such as gypsum and ettringite, leading to internal expansion, cracking, and surface peeling.
Geopolymer concrete has good corrosion resistance, and basalt fiber can effectively improve the toughness and crack resistance of cement-based materials.
The combination of the two, basalt fiber reinforced geopolymer concrete, has potential applications in marine engineering.
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Literature Express | Lightweight Polymer Concrete: Study on the Influence of Resin and Perlite Types on Durability
Polymer concrete is widely used in the field of construction due to its excellent mechanical properties and durability, but its long-term durability in high temperature and freeze-thaw environments still faces challenges.
The influence of commonly used thermosetting resins on the overall performance of polymer concrete has not been fully elucidated, and there is insufficient research on natural and expanded perlite as fillers, resulting in a lack of systematic guidance for actual engineering material selection.
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Detection and analysis of the influence of admixtures on the rheological properties of concrete in different seasons
The rheological properties of concrete, as a core indicator of the workability of fresh concrete, directly determine the construction pouring efficiency, forming quality, and subsequent mechanical performance development.
Its stability is influenced by multiple factors such as raw material characteristics, mix design, and environmental conditions.
In engineering practice, the temperature, humidity, and diurnal temperature differences caused by seasonal changes are key environmental factors leading to fluctuations in the rheological properties of concrete – high temperatures in summer accelerate cement hydration reactions, which can easily cause rapid loss of slump; The low temperature in winter may suppress the adsorption efficiency of additives, which may induce the risk of slump rebound and segregation; The significant temperature difference between day and night in autumn leads to a dynamic fluctuation of “early strength and late weakness” in concrete; The temperature and humidity in spring are moderate, but there are still issues of rheological instability caused by short-term climate fluctuations.
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