The design, construction and acceptance test procedures of soil hardening technology use TS additive shall be conducted in accordance with the following documents:
- The norm of works construction estimate promulgated together with the Construction Ministry’s Circular No. 10/2019/TT-BXD dated December 26, 2019.
- The process of using reinforced soil with inorganic binder in road construction 22/TCN/81-84 issued by the Ministry of Transport together with Decision No. 2917/QD-KT4 dated 21/12/1984.
- National standard of TCVN 10379: 2014 (Reinforcement of soil with inorganic adhesives, chemicals or synthetic reinforcement, used in road construction and acceptance.).
- Decision No. 1588/QD-BGTVT dated 23/05/2016 (Technical regulations for design, construction and acceptance of the cold reclamation layer on site with cement or cement and asphalt emulsion in the road fabric).
Details of documment:
Typical road structure:
Pavement.
- Usually 5 cm thick.
- Asphal concrete, medium grain plastic.
- Modyn elastic road surface Eth> 160 Mpa.
Classification of hardening by TS additive.
- Usually 20 cm thick.
- The substrate material reinforced with TS additive + Cement.
Natural soil layer.
- Natural ground.
- Modyn Elastic Ground Naturals Etn> 55 Mpa.
- The natural land of K luong with K = 95.
Construction equipment:
The reinforcement of local material recycling with cement additives with TS additives must be done by specialized means (material milling machine) such as Sakai material recycling.
In addition, there must be enough other synchronous construction equipment such as: sheep pulleys, iron wheel vibrators, tire wheelers, scraper, stone spreaders, watering machines, water pumps.
Construction process:
Repairing, upgrading roads:
For existing roads, the process of plucking, upgrading and repairing is carried out continuously according to the process and synchronous implementation of each 300m of road.
Construction of new roads:
Create a road base on the basis of the existing road so that the reinforced concrete foundation has the width and the length of the right track. The road base must be leveled to K95.
Dump the soil or mix it to the ground, use a pre-hauled bulldozer and then use a ground milling machine to mow the soil so that the fineness is achieved according to the required reinforcement.
Drip add TS additive with water at prescribed rates, pumping TS solution into the soil has been milled according to the use rate. Use soil mixer to add TS to soil.
Spread cement on the ground with TS, water. We use PC 30 standard.
Use a Sakai machine to mix soil with TS additive and cement.
Determine the optimum moisture content using bulldozers or scooters to make the floor clear, then use a roller compactor.
Moisture-resistant foundation. Water every day from 01 to 05 days to reach the foundation to achieve elastic design.
