This guidance is primarily aimed at public procurers involved in a range of contracting agreements related to building materials and products. This includes the purchase of building materials for construction works, but may also extend to material extraction, manufacturing, building, retrofit, refurbishment, design, interior fit out, and end-of-life demolition or deconstruction processes. 

This work highlights the reactivity of soda-lime glass powder on cement CEM IV-B-L 32.5R. Three colors of soda lime glass were used with varying amount of powder from 0 to 35 wt%. The water demand for standard consistency have increased from 28.40 to 45.93 wt%. The compressive strength increased from 26.46 to 31.66 MPa and the flexural strength also increased from 5.89 to 7.14 MPa after 28 days. The optimal value of 10 wt% of glass powder gave the maximum value of mechanical strength at 28 days.

Carbon neutrality to limit global warming is an increasing challenge for all industries, particularly for the cement industry, due to the chemical emission of the process. For decades, reducing the clinker factor has been one of the main strategies to reduce the carbon footprint. Additional cuttings in the clinker content of cements seem possible with the upsurge of novel supplementary cementitious materials.

The use of supplementary cementitious materials (SCMs) to replace part of the clinker in cement is the most successful strategy to reduce CO2 emissions in the global cement industry. However, limited supplies of conventional SCMs make it difficult to take this strategy further unless new types of SCMs become available.

The only type of material available in the quantities needed to meet demand is clay containing kaolinite, which can be calcined to produce an effective SCM. Such clays are widely available in countries where most growth in demand for cement is forecast.

Construction commenced on this project in 2006, and it was officially opened in 2009, taking a total of 42 months to complete. The concrete piers of this iconic bridge were constructed using 50% Ecocem GGBS, saving thousands of tonnes of CO2 and greatly increasing the bridge's lifespan.

As the need to stem climate change gains in urgency virtually by the day, new environmentally sensitive practices and policies targeted at limiting the global average temperature increase to 1.5°C above pre-industrial levels are essential. This is particularly relevant in the manufacturing of cement – the key ingredient in concrete. The world is in the midst of an infrastructure and building boom as new economies emerge and developed economies expand.

LC3 is a new type of cement that is based on a blend of limestone and calcined clay. LC3 can reduce CO2 emissions by up to 40%, is made using limestone and low-grade clays which are available in abundant quantities, is cost effective and does not require capital intensive modifications to existing cement plants.

The objective of the LC3-Project is, through research and testing, to make LC3 a standard and mainstream general-use cement in the global cement market.

The Transition Pathway Initiative Global Climate Transition Centre (TPI Centre) is an independent, authoritative source of research and data into the progress being made by the financial and corporate world in making the transition to a low-carbon economy.

The Inventory of Carbon and Energy (also know as the ICE database) is an embodied carbon database for building materials which is available for free on this page. It contains data for over 200 materials, broken down into over 30 main material categories. The first version was released in 2005 and it has been updated at periodic intervals. 

The Construction Material Pyramid from CINARK at the Royal Danish Academy makes it possible to compare, for example, CO2 footprints between different categories of materials or between material types within the same category. It also makes it possible to view different kinds of environmental impacts across the different materials. It thus offers a tangible, interactive calculation tool and at the same time opens up a dialogue about more detailed studies of the materials’ position in the pyramid and later their place in the project design.