Sprayed Concrete Technologies
Successful sprayed concrete requires the combination of many aspects of modern concrete technology especially concrete admixture chemistry, together with modern materials handling technology.
The increasing demands for cost-effectiveness and the protection of health and the environment mean that sprayed concrete has been in continuous development. Sika’s products for sprayed concrete represent the newest generation and cutting-edge technologies that have resulted from more than one hundred years of involvement in the business. With this experience, expert knowledge and a focus on performance and economy, Sika provides reliable proven solutions!
The multiple demands placed on sprayed concrete today no longer allow standard solutions. Dependent on the spray process and the type of structure, different conditions are imposed on the sprayed concrete during application and in service. In tunnel construction sprayed concrete is normally used for excavation stabilization, in open-pit mining and on major construction sites it is typically used for rock and soil stabilization on slopes.
In bridge and other civil engineering repair and refurbishment works, sprayed concrete is often used specifically because formwork can thereby be dispensed with. Through more than 100 years of activity in these complex areas, Sika profoundly understands the difficulties and challenges and provides solutions that surmount them.
Sika Products for Shotcrete
Types of Products for Sprayed Concrete
Sigunit® -Shotcrete accelerators, available as liquid, powder or instant powder, for the highest strength development, ideal for overhead applications and building-up thicker layers.
SikaFume® – Micro silica additives that significantly improves the shotcrete and its durability: Optimum adhesion and minimal rebound, followed by watertight durability.
Sika ViscoFlow® – High range water reducing superplasticizers for better workability of the concrete mix, higher compressive strength and increased durability of the shotcrete.
FlexoDrain – Substrate drainage system installed to allow the shotcrete application in case of moderate water ingress and protecting the lining from aggressive mountain water.
SikaTard® – Cement hydration stabilizer to ensure long term stabilization of the concrete mix, enabling optimum shotcrete application with the highest flexibility – Always just in time.
Aliva®- Specialist equipment for all types of wet and dry process shotcrete application and accelerator dosing. Off the-shelf and tailor-madesolutions.
SikaPump®- Pumping aids improve the pumpability of the concrete mix. For a smooth pumping process over long distances and time, with minimal friction and wear on the equipment.
SikaCare- Reduces the adhesion of cement mortar and concrete to the equipment, allowing extended use, lower wear and easier cleaning after the application.
SikaTell® – Colloidal silica additive for stabilizing the concrete mix cohesion and thereby reducing rebound and improving the long-term durability of the shotcrete.
SikaPump®-Start 1- Lubricant for concrete pumps, significantly reducing the friction between concrete and hoses/pipes, during the start-up of the pumping process.
SikaFibre® – Steel or synthetic fibers used to increase the resilience and energy absorption of the shotcrete. Highest performance with maximum efficiency.
SikaShot® – Highly accelerated spray mortar for consolidating and pre-sealing the substrate. Ideal pretreatment under difficult conditions for the optimum shotcrete lining.