Categoria: Notícias

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Dextra is showcasing innovative ground engineering solutions, featuring Olhos macios GFRP e Rock-Bolts, at the World Tunnel Digital Congress (WTC) 2020 on September 14-16, 2020.

WTC is one of the world’s leading tunneling event that explores the latest innovations, trends and advances in all areas of tunneling, from tunnel project development to both design and construction.

The event is moved to a fully digital platform due to the impact of COVID-19: it will include online technical paper presentations, along with training courses, and virtual exhibitions by companies from all over the world.

Dextra features a wide range of underground temporary and permanent support solutions, with a focus on cuttable glass fiber reinforcement polymer (GFRP) technology: join us at the virtual exhibition at booth no. SS11 (Silver Sponsor)!

Read more about Dextra solutions

Dextra GFRP rebar technology is featured in the April 2020 issue of the SAICE Civil Engineering magazine.

The article provides guidance on the design of lateral support systems using FRP rebars as soil nails or ground anchors.

Fiber-reinforced polymers are increasingly used in mining and tunneling projects as they provide high performance while being easily cuttable, corrosion-free and lighter in weight with respect to steel rebars.

Read the full issue

For more information on Dextra GFRP rebars

We are excited to announce that a wide range of Dextra ground engineering solutions is now available in the Rocscience programs Slide2, Slide3, RS2 e RS3.

Rocscience is a world leader in developing 2D and 3D software for civil, mining, and geotechnical engineers. For over 20 years, they have built on leading-edge research to create the best geotechnical software available.

Users will be able to select Dextra products from a built-in list and integrate them directly into their design.

The Dextra products that are available in the Rocscience suite include:

• ASTEC Active Anchor TB3

• ASTEC Combination Bolt

• ASTEC GFRP Injected Thread Rockbolt

• ASTEC GFRP Thrust Bolt

• ASTEC Soil Nail Grade 50

• GEOTEC GFRP Rockbolt

• GEOTEC GFRP Self Drilling Rockbolt

Dextra ground engineering solutions are high performance and versatile. Due to their cuttability, the bolts can be used for the stabilization of soil-covered slopes, face bolting and other tunneling/mining works in both temporary and permanent applications.

Learn more about Dextra soil stabilization solutions

Learn more about Dextra tunneling and mining solutions

We are delighted to share with you our ISO 14001:2015 (environmental management system) certificate awarded by the Bureau Veritas Certification.

It is to certify that the management system of Dextra China has been audited and found to be in accordance with the requirements of the management system standards, in the scope of design, manufacturing and sales of products.

With the update of our ISO 9001 certification in 2018, this new environmental certification completes a solid quality system in the Guangzhou office.

Dextra has been consistent in creating a green and environmentally sustainable manufacturing system.

We have been improving our quality management system and raising environment awareness in our daily operations.

Contact Dextra in China

The Imperial College London tested Dextra Bartec/Fortec and Griptec couplers at elevated temperatures to evaluate how the couplers would perform in case of a fire.

Highlights of the test include:

Please read full article below:

Dextra have recently collaborated with Imperial College London to investigate the performance of rebar couplers at elevated temperatures, simulating temperatures which could occur in rebar due to fire, both before and after concrete spalling.

Standard 16mm and 20mm Bartec/Fortec and Griptec couplers were used, as well as non-spliced reinforcement and tests conducted at ambient, elevated steady state and transient elevated temperatures.

Codified procedures for the fire design of reinforced concrete structures typically give prescriptive recommendations for rebar/coupler cover with the aim of protecting the reinforcement from reaching temperatures above a critical value of around 500°C.

The test results show that:

The findings also indicate that current codified rules can be used for assessing the strength and stiffness properties of both non-spliced rebar and rebar connected with Bartec/Fortec or Griptec couplers.

However, the code assumptions regarding the ultimate strain characteristics at elevated temperatures were found to be unrealistic for hot rolled rebar, as well as rebar connected by couplers.

Need more information about our couplers?

Discover our coupler range

The safety and security of our employees, customers, and other stakeholders are our top priorities.

Dextra Group has implemented measures based on guidance received from local authorities in order to help prevent the spread of COVID-19 infections.

These measures include:

– Either normal work, alternate work or work from home according to the local health authorities’ recommendations.

– For all employees in our offices or factories, strict social distancing and strict limitation of visitors allowed in Dextra’s premises.

– Reduction of meetings and contact with third parties to the bare minimum.

– Extensive access to sanitizing and protection products.

– Deep cleaning and fumigation of facilities whenever applicable.

– Cancellation of all travels, domestic and international.

For the time being, each Dextra affiliate will keep enforcing and updating its preventive measures according to the local regulations.

Despite the critical situation worldwide, Dextra team is committed more than ever to provide the best service possible to its customers while guaranteeing the safety of all parties involved.

Our factory in India, which serves only the local market, is complying with the complete lockdown imposed by the Indian government. Our main factories, in Thailand and China, are currently fully operational and delivering goods and services as usual. Their supply chains are not hampered by the current restrictions.

Please follow the indications of the World Health Organization and local governmental health agencies in order to prevent unnecessary risks, minimize the spreading of the virus and be safe.

We are pleased to announce the release of the Headed Bar Calculation Tool, available for Bartec/Fortec, Griptec and Rolltec product ranges.

This document will allow designers to easily calculate the minimum edge and spacing requirements, confinement reinforcement and if necessary, rebar bond contribution for Dextra headed bars.

The new release is complementary to the Arup/Dextra step by step design guide, which is intended as a non-contradictory supplement to Eurocode 2.

Simplify your work and take advantage of Dextra tools!

Download the calculation tool

Download the Dextra/Arup design guide