Eco-friendly Concrete at Vietnam's 'Lotte Mall Hanoi'... Reducing 4,920 Tons of Carbon Dioxide

Approximately 36% Reduction in Carbon Dioxide Compared to Previous Levels
Concrete Long-Term Strength Improved by 20%

Lotte Mall Hanoi Bird's-eye View

Lotte Construction announced on the 17th that it successfully poured 46,000㎥ of eco-friendly concrete using slag in the foundation work of 'Lotte Mall Hanoi,' currently under construction in Vietnam, marking the first use of slag in foundation work in the Hanoi area. Lotte Mall Hanoi is a complex shopping mall located in the new urban area of Tay Ho District, Hanoi.

Eco-friendly concrete reduces the amount of cement, a common concrete binder, by 50%, while increasing the proportions of fly ash and ground granulated blast-furnace slag (GGBS) powder by 20% and 30%, respectively. This not only reduces carbon dioxide emissions but also enhances the durability (long-term strength and watertightness) of the building.

In the Hanoi region of Vietnam, ready-mixed concrete typically used a mix with about 15% fly ash in addition to cement as the binder. However, since the establishment of a steel plant in Hanoi in 2019, slag production has become possible.

Accordingly, Lotte Construction conducted joint research with IBST (Vietnam Institute for Building Science and Technology), a construction technology research institute under the Vietnamese Ministry of Construction, to develop a concrete mix using ground granulated blast-furnace slag powder.

As a result, they developed concrete that lowers the heat of hydration during curing by 10℃ compared to the conventional mix, improves long-term concrete strength by 20% after 90 days, and enhances watertightness by 2 grades (33%).

Lotte Mall Hanoi Site Basic Construction Concrete Pouring Overview

Additionally, this technology reduces the use of cement, which emits large amounts of greenhouse gases such as carbon dioxide during manufacturing, by substituting it with ground granulated blast-furnace slag powder and fly ash, which emit about 3% of the carbon dioxide compared to cement. Consequently, it contributes to preserving the global environment through greenhouse gas reduction. In fact, applying this technology to Lotte Mall Hanoi reduced carbon dioxide emissions by approximately 4,920 tons.

A representative from Lotte Construction’s Technology Research Institute stated, "While this method of eco-friendly concrete has already been applied domestically, slag production in Vietnam has been limited, so only small amounts of fly ash were used. After joint research with IBST, we were able to apply this concrete mix for the first time at a site in the Hanoi area."

IBST, which holds the authority to legislate construction-related laws in Vietnam, stated, "Based on the successful field application of eco-friendly concrete in Hanoi, we will expand the application of slag by establishing institutional standards and promoting the technology to clients, designers, and contractors."

This content was produced with the assistance of AI translation services.