Number

190-EN

Section

General Section

Use

Abstract

Injectable mortar is used to join concrete construction elements, for example in the construction of buildings. Conventional products contain allergenic substances and require specialist application training. Furthermore, the material has to be dealt with as hazardous waste. Following environmental demands from one of Skanska’s clients, the supplier developed a new product, which involved the removal of one hazardous substance and the significant reduction of another. In addition, the new product requires no specific safety measures during application.

Substituted substances

Alternative Substances

Reliability of information

Evidence of implementation: there is evidence that the solution was implemented and in use at time of publication

Reason substitution

skin/respiratory sensitizing

Hazard Assessment

Substances to be substituted: Hydroxypropyl methacrylate may cause an allergic skin reaction, according to Annex VI of Regulation (EC) No 1272/2008 (CLP Regulation). It fulfils the criteria to be listed in the Substance Database according to SUBSPORTplus Screening Criteria (SDSC). Benzoyl peroxide may cause an allergic skin reaction, according to Annex VI of Regulation (EC) No 1272/2008 (CLP Regulation). It fulfils the criteria to be listed in the Substance Database according to SUBSPORTplus Screening Criteria (SDSC). Alternative substances: The alternative substance polyethylene glycol dimethacrylate is not listed in the SUBSPORTplus Database and has no harmonised classification according to Annex VI of Regulation (EC) No 1272/2008 (CLP Regulation). Benzoyl peroxide is not completely removed from the alternative newly-developed product, but it is reduced to less than 1% compared to typical concentrations of 5-10%. Hydroxypropyl methacrylate is removed in the alternative product.

Description of Substitution

Our Client, Stockholm County Council, have set requirements to reduce the use of hazardous materials in the construction of a new hospital. This complements Skanska’s Green Business aim to futureproof buildings. The injectable mortar is used to join concrete elements and conventional products would require special training and special measures to avoid causing allergic reactions, as it is a thermosetting resin. The supplier, Hilti, introduced a new product that they had developed in 2010 to meet the requirements of BASTA, a non-profit company owned jointly by IVL (Swedish Environmental Research Institute and the Swedish Construction Federation). This was one of their first opportunities to use it on a building project. The objectives of BASTA are to speed up the phasing out of dangerous substances in construction products. Hilti had developed the alternative concrete joining material, which contains less allergens. Drivers for Skanska were the Client requirements as well as our internal Green Business, which seeks green solutions to build future proof buildings. Hilti offered Skanska the opportunity to work in partnership in order to use and further develop the product on a building project site. The conventional substance used for this purpose would require specialized training as it is a so-called thermosetting resin (thermosetting plastic) and required specific health checks prior to working with the substance as well as after use and monitoring. The supplier provided training at the release of the new product and the concerns identified were that it should not be used in temperatures below -5°C. There was an option to heat the product if it became too cold. The construction was partly being conducted during cold weather and it required cooperation with the supplier to establish work methods and solutions to make it work on such occasions. Case/substitution evaluation Differences identified between the two products:

Hilti Hit CT-1 (new product)	Hilti Hit HY-150
Operating temperature: -5°C- +40 °C	Operating temperature: -10°C- +40 °C
Storage temperature: +5 °C - +40 °C	Storage temperature: +5 °C - +40 °C
No thermosetting plastic	Thermosetting plastic:
Could be allergenic	a) Extended PPE
Waste handled as combustible waste	b) Medical examination required for workers
	c) Health impact
	Hazardous waste

In addition, the working time and curing time differ, with less time required at both occasions for the new material. This experience demonstrates supply chain collaboration to substitute hazardous substances. We do not yet have the full chemical content list for the new product and cannot make a comprehensive hazard assessment, but the product has passed the criteria for the database BASTA, which is a substitution database for building materials.

Case/substitution evaluation

This is an interesting story describing supply chain collaboration to substitute hazardous substances. We do not have the full content of the alternative product and cannot make a comprehensive hazard assessment, but the alternative chemical disclosed, polyethylene glycol dimethacrylate, do pass SUBSPORTplus criteria. Benzoyl peroxide however, is on the database of hazardous substances according to SUBSPORTplus screening criteria (SDSC), this substance is not completely removed, but significantly reduced in the alternative product. With one hazardous substance replaced and the other reduced, the alternative product is to prefer. The alternative product has passed the criteria for the database BASTA, which is a substitution database for building materials. Accordingly, further research should be conducted into the complete substitution of this substance

State of implementation

Full capacity

Date and place of implementation

2011, Sweden

Enterprise using the alternative

Skanska

Availability ofAlternative

On the market

Producer/Provider

Hilti

Type of information supplier

User

Contact

Skanska

Further information

Hilti: Injectable Adhesive Anchors https://www.hilti.de/c/CLS_FASTENER_7135/CLS_INJECTABLE_ADHESIVE_ANCHORS_7135">https://www.hilti.com/c/CLS_FASTENER_7135/CLS_INJECTABLE_ADHESIVE_ANCHORS_7135">https://www.hilti.de/c/CLS_FASTENER_7135/CLS_INJECTABLE_ADHESIVE_ANCHORS_7135 Hilti: HIT-CT 1 https://www.hilti.de/c/CLS_FASTENER_7135/CLS_INJECTABLE_ADHESIVE_ANCHORS_7135/r4835">https://www.hilti.de/c/CLS_FASTENER_7135/CLS_INJECTABLE_ADHESIVE_ANCHORS_7135/r4835">https://www.hilti.de/c/CLS_FASTENER_7135/CLS_INJECTABLE_ADHESIVE_ANCHORS_7135/r4835 Link to BASTA,">http://www.bastaonline.se">BASTA, substitution database for building materials.

Date, reviewed

November 26, 2021