Magnesium oxide expansive agents are calcined using technologically advanced rotary kilns, thereby addressing the performance gaps of calcium oxide and calcium sulfoaluminate expansive agents and broadening the application scope of compensating shrinkage concrete.
(1) Controllable expansion properties: The expansion characteristics of this product can be regulated. This not only refers to adjusting the dosage to influence its expansion behaviour, but more significantly, through advanced, controllable production processes, the calcination temperature and holding time can be modified to control the activity of the magnesium oxide expansive agent. This enables precise regulation of the product’s expansion properties, achieving the objective of customised production.
(2) The product can be customised to achieve coordinated development of product expansion and concrete shrinkage under varying conditions, providing synchronous compensation throughout the entire service life: By designing magnesium oxide expansive agents with different dosages and reactivity levels according to concrete strength grades, structural dimensions, pouring temperatures, and service environments, coordinated compensation between product expansion and concrete shrinkage can be achieved throughout the entire service life under diverse operational conditions.
(3) The product exhibits excellent homogeneity and stable expansion performance: Employing technologically advanced rotary kiln calcination for magnesium oxide, this process eliminates under- or over-firing issues inherent in vertical kiln methods. Consequently, the product demonstrates superior homogeneity and more consistent expansion characteristics.
Synthetic fibers refer to fiber materials produced through chemical synthesis, with common examples including polypropylene fibers and polyester fibers. These synthetic fibers are incorporated into concrete to enhance its performance. They improve the tensile strength, crack resistance, and toughness of concrete, thereby playing a positive role in extending its service life.
Viscosity Modifying Agent (VMA) primarily serves to alter the rheological properties of concrete, particularly the plastic viscosity of freshly mixed concrete.
Concrete retarders primarily inhibit the hydration reaction of cement, enabling freshly mixed concrete to retain plasticity for an extended period. This facilitates the smooth execution of various construction processes—including pumping, placing, vibrating, and finishing—while enhancing overall work efficiency.
Concrete ultra-early strength agents and concrete performance enhancers are industry-leading products designed based on the theory of early cement hydration crystallisation nucleation. They significantly reduce setting time without compromising the workability of fresh concrete, while substantially accelerating strength development from final setting to within 24 hours. These products exert no adverse effects on the long-term mechanical properties or durability of concrete.
Polycarboxylic superplasticisers exhibit high water-reduction rates, excellent dispersibility, and superior adaptability, enhancing both early and late-stage strength. They impart concrete and mortar with favourable workability and durability. Powdered superplasticisers offer greater convenience in transportation and application compared to liquid variants.
Improving concrete surfaces involves various requirements: some demand smooth surfaces with high strength, while others require textured surfaces with distinct tactile qualities. This necessitates the use of different types of admixtures to meet the specific demands of concrete surfaces.