Displaying items by tag: strength

India: Nuvoco Vistas has launched Duraguard Microfibre Cement, a fibre reinforced cement. The cement’s clinker is 48-52% tricalcium silicate, with low tricalcium aluminate, and contains electrostatically precipitated dry fly ash. The producer says that it offers enhanced bonding, crack resistance, strength and durability and reduced permeability, as well as a smoother surface finish, compared with ordinary Portland cement (OPC). Nuvoco Vistas first applied for a patent for the product in mid-2018.

Managing director Jayakumar Krishnaswamy said "We prioritise innovation. Our Construction Development and Innovation Centre (CDIC) is dedicated to creating sustainable and innovative products that meet the highest global standards. The awarded patent validates our unwavering commitment to innovation and keeps us in the forefront of pioneering advances in the cement industry, delivering exceptional quality and responsible business practices."

Egypt: Researchers at the University of Cairo have used nanomaterials from agricultural wastes to produce biocement with 'increased strength and durability' compared to ordinary Portland cement (OPC). The study employed microbially induced calcite precipitation (MICP) with the addition of carbon nitride nanosheets and ash from waste maize cobs. Besides its improved physical performance, the researchers also found that their biocement offers improved endurance against water permeability.

Sri Lanka: Bogala Graphite has launched its new cement-strengthening graphene oxide additive. Daily FT News has reported that potential investors will be able to discuss the new technology with Bogala Graphite at the forthcoming Industry 4.0 and Industry 5.0 exhibition later in February 2023.

Philippines: Holcim Philippines carried out 70 upgrades aimed at increasing automation in its operations during 2022. The projects aim to optimise cement production, generate cost savings and ensure best safety practices. The Manila Times has reported that new Industry 4.0 initiatives include equipment monitoring systems offering 90-day performance projections, software capable of predicting cement's strength development and drones to replace visual inspections in remote spaces.

Holcim Philippines said that it is currently exploring the use of new predictive technologies in its operations.

China: China Building Materials Academy has patented a new 3D printing method which uses short rebars to reinforce printed layers. The developer says that this will enable builders to ensure structural strength without the disruption caused to 3D printing by the long rebars of conventional building skeletons.

China Building Materials Academy said that an 'inverted U-shaped or inverted L-shaped short rebar is vertically inserted into the cement slurry layer, wherein the bending mechanism comprises two bending members, separately disposed on two sides of a clamp.'

UK: Karbonite UK has developed a new supplementary cementitious material consisting of mineral feedstock, geopolymers and waste biomass. The process also involves CO₂ sequestration and liquid-infused CO₂ absorption within the mineral structure. The material, called Karbonite, is activated at 750 – 850°C, releasing water, which is captured for recycling. Its CO2 emissions are 2.7kg/t, according to Karbonite UK. The developer says that Karbonite ground with 50% clinker yields a cement of equal compressive strength to ordinary Portland cement (OPC).

Karbonite UK is currently preparing a final report on the product for a major cement producer.

Managing director Rajeev Sood said “Karbonite offers a wealth of potential to an industry targeting net zero. We are excited to talk to cement and concrete producers about how they could integrate Karbonite technology into their existing process.”

Canada: Progressive Planet Solutions has successfully produced a new supplementary cementitious material (SCM) called PozDE from diatomaceous earth. The company says that it developed PozDE using calcium bentonite-containing diatomaceous earth from the Red Lake mine in Kamloops, British Colombia. The SCM’s seven-day and 28-day strength activity index (SAI) values are 101% and 120% those of ordinary Portland cement (OPC) respectively, while its water demand is lower at 98%.

Chief operating officer Ian Grant said “It is uncommon to see SCMs exceed the 7-day strength of the control Portland, so we are excited to see better strength while indicating lower water demand."

US: ASGCO has launched its Grizzly Screw-Splice, a conveyor belt splicing and fastening system. The splice is available in various rubber compounds with a tensile strength of up to 1650PIW. The supplier says that the product is stronger, wears less and has a lower-profile silhouette than traditional metal fasteners for conveyor belts. It features self-tapping and self-drilling screws that uphold the toughness of the conveyor belt by passing through the belt carcass instead of creating holes.

Kenya: Affordable housing joint venture 14Trees and UK-based development finance company CDC Group have 3D printed a complex of 52 houses near Kilifi, Kilifi county. The development, called Mvule Gardens, uses an IFC-EDGE Advanced-certified sustainable design to support the ecological regeneration of its locale. Swtizerland-based Holcim, which holds a stake in 14Trees, supplied its TectorPrint ink for use in buildings’ walls to increase strength.

Holcim CEO Jan Jenisch said “We are excited to be building one of the world’s largest 3D-printed affordable housing projects in Kenya. With today’s rapid urbanisation, over 3bn people are expected to need affordable housing by 2030. This issue is most acute in Africa, with countries like Kenya already facing an estimated shortage of 2m houses. By deploying 3D printing, we can address this infrastructure gap at scale, to increase living standards for all.”

Australia: A paper published in the journal Resources, Conservation and Recycling has reported that concrete made with treated slag is 8% stronger than standard slag concrete and 17% stronger than concrete made with conventional aggregates. A Royal Melbourne Institute of Technology (RMIT) team produced treated slag concrete using slag that had absorbed phosphate, magnesium, iron, calcium, silica and aluminium during use in wastewater treatment. Researcher Biplob Pramanik said, “The things that we want to remove from water are actually beneficial to concrete.” Pramanik said that the findings have promising implications for the water and concrete sectors within the circular economy.