Displaying items by tag: Infrastructure
US: Hawaii’s Department of Transportation plans to use carbon-injected concrete for its new projects. This will include a new structure to protect a highway tunnel from rockfalls, according to Reuters. The Department of Transportation was testing CO2-injected concrete on an access road project with CarbonCure Technologies in May 2019. The latest decision follows a resolution by state legislators that city administrators ‘consider’ using CO2-injected concrete in city and county infrastructure where concrete is used.
In late June 2019 CarbonCure announced that its had formed a partnership with HC&D Ready Mix, a local concrete producer, to use its CO2-injected concrete process. It is the second deal with a concrete producer in the state that CarbonCure has arranged.
UK: Hanson has been part of a new continuous concrete pour record in the UK as part of its work at the EDF Energy’s Hinkley Point C (HPC) new nuclear power station in Somerset. It supplied raw materials for the concrete to main civil engineering contractor BYLOR, which operates the on-site concrete production plant. The 9000m3, five-day, pour was to construct the last of five reinforced concrete segments that make up the cross-shaped foundations on which all of the first nuclear reactor’s buildings will sit. The record-breaking pour beats the previous UK record set by the Shard skyscraper in London.
The completion of the foundation platform, which is up to 4m thick, represents a significant milestone for the project, described by EDF Energy as J-zero. It marks the transition from below ground activity to the construction of permanent reactor buildings above ground.
Hanson says that mix design for HPC took three years of development and testing to ensure that the concrete was of the required quality mandated by the Office for Nuclear Regulation. The subsidiary of Germany’s HeidelbergCement has 65 employees directly involved in the HPC project team. To date Hanson has supplied 51,000m3 of concrete, 2.5Mt of aggregates, 210,000t of marine sand, 65,000t of cement; 105,000t of ground granulated blast furnace slag (GGBS) and 125,000t of asphalt.
Bolivia: The Bolivian parliament has approved draft legislation prioritising the use of locally produced cement by local government and state-owned companies for infrastructure projects and road construction. The law will support the opening of two new cement plants at Potosí and Oruro in late 2019, according to El Potosi. The new rules further extend a decree announced in March 2019.
Germany/Portugal: Talleres Alquezar has been using two BHS mixers in a modular plant to produce a total volume of 400,000m3 of hydro dam concrete in Portugal since 2017. Two DKX 4.5 type twin-shaft batch mixers, each with a capacity of 4.5m3, have been integrated into the plant. Germany’s BHS says that using twin-shaft batch mixers has shown that can be utilised successfully to produce this kind of specialised concrete.
Three hydro dams are being built on the Tâmega River that are expected to generate 1760GWh for the Iberian market once they have been commissioned as part of Spanish energy group Iberdrola’s large-scale hydroelectric project in Portugal. 242,000m3 of concrete is needed in Daivões for the dam wall alone, which is planned to be 78m high and 265m long. Spain’s Talleres Alquezar is the project partner for this hydro dam. Once built, the construction in Daivões is expected to dam up to 56,200,000m3 of water.
France: Cemex has supplied over 0.3Mm3 of ready-mixed concrete and more than 0.55Mt of aggregates for the Grand Paris Express project over the past three years. It has used mobile on-site concrete plants and a local network of 21 plants in Île-de-France to support the large-scale railway infrastructure scheme.
"The Grand Paris worksites present a daily challenge to deliver ready-mix concrete on time, supply aggregates to our production sites, and move earthworks from the stations and tunnels out of Paris,” said Benjamin Lecendrier, Major Projects Director at Cemex France.
The Grand Paris Express worksites on metro lines 11, 14 and several sections of line 15 South have involved most of Cemex’s staff in the Île-de-France region, with four full-time operatives working in a dedicated unit. Given the scale of operations, logistical organisation is a challenge, with the twin demands of delivering construction materials and removing 40Mt of earthwork by 2030.
Bhutan: Dungsam Cement has reduced its loss in 2018 by increasing its production volumes. It reported a loss of US$0.43m in 2018 from US$10.3m in 2017, according to the Bhutan Broadcasting Service. Its cement production volume more than tripled to 0.63Mt in 2018 from 0.2Mt in 2014.
The plant at Nganglam has commissioned in 2014 and it has reportedly been making a loss since then due to a loan. The cement producer has suffered from a low production capacity utilisation rate, as the plant has a production capacity of 1.3Mt/yr and it has had problems exporting cement to India. However, sales to hydroelectric projects in the country have been increasing.
Japan: Taiheiyo Cement’s sales rose by 5% year-on-year to US$8.36bn in the year to 31 March 2019 from US$7.95bn in the same period in 2018. Its net income grew by 12.8% to US$397m from US$352m. The group’s cement sales volumes rose by 3.5% to 15.4Mt. However, its exports fell by 18% to 3.5Mt. It noted that infrastructure projects for high-speed railway and the Tokyo Olympics had driven local demand for cement.
Germany: Dyckerhoff is supplying 12,000t of CEM III/A 32.5 N-LH cement to Frankfurt Airport for the production of underwater concrete. The airport is building a new terminal and the construction pit for the floor slab is deeper than the groundwater level, hence the floor slab must be concreted underwater.
The construction pit has a size of almost 66,000m² with excavation carried out in dry conditions to a depth of 5.5m to the groundwater table. Then a further 8 -11m was excavated in wet conditions using industrial divers. The excavation pit has been prepared in sections and then concreted by the divers resulting in short sections. The quantities of cement to be delivered by Dyckerhoff also fluctuate considerably, with sometimes 20 silo trucks/day leaving the Dyckerhoff plant in Wiesbaden. Deliveries started in March 2019.
Around 40,000m3 of concrete has been produced by Sehring Beton, using a mobile mixing plant directly on site. The construction work is being carried out by the Arge Ingenieurbau Baugrube T3, which consists of the two companies Adam Hörnig Bau and Bickhardt Bau.
Malaysia: Lafarge Malaysia has resumed supplying cement to the East Coast Rail Link project. The cement producer has been asked to continue supplying the project until the end of 2019, according to the Star newspaper. The US$65m contract was originally agreed in March 2018 but then suspended in July 2018 when the government reviewed the project.
Bangladesh: Sayem Sobhan Anvir, the managing director of Bashundhara Group, has signed a cement supply agreement with Tao Jun, the project manager of the Padma Bridge Rail Link for China Railway Group. Bashundhara Group will supply over 0.7Mt of cement for the project, according to Daily Sun newspaper. The US$3bn train line will run for 225km between Dhaka and Jessore.
