Alkaline activation of inert industrial wastes and clay by-products, process for their implementation and use in construction

  1. Home
  2. Interface

Patent Details

Publication Number
PT103916
Priority Date
2007-12-28
Publication Date
2009-06-29
International Patent Classification
C04B18/30

Figures

figura
View of distinct prototypes.

Abstract

The present invention relates to articles for the building industry based on inert industrial waste, natural clays or clay by-products, obtained by alkaline activation method. In optimal conditions, bodies with adequate mechanical strength (30 MPa) and increased resistance to salt or acid attack are obtained. These products present a performance similar to that of common cement bodies with the advantage of using material from industrial waste and clay products or by-products. Optimization of processing conditions in terms of solids composition, activator/solids ratio and cure conditions, promotes an effective mechanical and structural development. This solution also presents environmental added value, translated in the recycling of wastes as raw materials.

Innovative aspects & main advantages

The present invention relates to the production of building artifacts by using the alkaline activation of inert industrial wastes, mixed with natural clays or clay-based by-products. These products show properties similar to those presented by common cement-based bodies, and is a way to recycle distinct industrial wastes and by-products. Among the used wastes, we used dust or fines collected from ceramics production, namely from lightweight aggregates manufacturing, sludge and fines from cutting and polishing of natural stones, rejects of glass cullet, aluminium anodizing sludge and foundry sand. In optimal conditions, produced bodies show compressive strength over 30 MPa and high resistance to salts or acids attack. Increasing thermal insulation might be also achieved by using lightweight and porous components in the mix.

Applications

The industrial applicability is here focused in the manufacturing of building materials (e.g. concrete artifacts). Wastes producers might also be a target, as an alternative to landfilling practices.

Inventors

Batista, João; Ferreira, Victor; Pinto, Amândio; Tavares, Pedro

Our Inventors

foto João António Labrincha Baptista

João António Labrincha Baptista

Full professor
foto Victor Miguel Carneiro de Sousa Ferreira

Victor Miguel Carneiro de Sousa Ferreira

Associate Professor

Applicant

Universidade de Aveiro
Universidade de Trás-os-Montes e Alto Douro

Groups Involved

G2 - Photonic, Electronic and Magnetic Materials
G5 - Biomimetic, Biological and Living Materials

Share this Patent

Related Patents

We use cookies for marketing activities and to offer you a better experience. By clicking “Accept Cookies” you agree with our cookie policy. Read about how we use cookies by clicking "Privacy and Cookie Policy".


Privacy and Cookie Policy

Personal data

CICECO-Aveiro Institute of Materials respects your privacy, ensuring confidentiality of personal data you share with the institution through this way, not collecting any personal information about you without your consent, under the terms required by General Data Protection Regulations (RGPD).

The data collected in forms are intended exclusively for processing user requests and will not be used for any other purpose, always safeguarding their confidentiality, under the terms of the protection conferred by the aforementioned regulation.

The collection and processing of data is the responsibility of CICECO and its storage is properly protected, only authorized CICECO employees can access the information within the scope of their functions, always being clear in the respective collection forms the purposes for which they are intended. The remaining issues to be considered in this matter will be handled by the University of Aveiro in accordance with the regime established by the GDPR.

Cookies policy

Cookies are small files with alphanumeric information that are stored on your computer's hard drive by your browser and are intended to improve the user experience and enhance website navigation.

Collection and use of technical information

The cookies used on CICECO are anonymous, and no information about our users that allows their personal identification is stored in them.

The technical information recorded consists of:

  • iP (Internet Protocol) address of the visitor;
  • the type of internet browser used by the website visitor and the respective operating system used;
  • the date and time of the consultation;
  • the pages visited on the site and the documents downloaded
  • The technical information collected is used for statistical purposes only.

Cookies used

Session cookies

These cookies are used to record user preferences, such as the language in which websites are displayed or to maintain authenticated user sessions, and are automatically deleted when the browser is closed.

Persistent cookies

These cookies store information that is needed between sessions. For example, a persistent cookie is set to record that you have been made aware of the cookie policy so that the message regarding this policy is not shown again the next time you visit the website. This cookie remains on the computer until it reaches its expiry date or is deleted by the user.

Data protection

The present privacy policy covers the Information System of the University of Aveiro (SIUA), governed by the General Data Protection Regulations (RGPD) Regulation (EU) No. 2016/679, of April 27th, 2016.

Data Protection Officer

The University of Aveiro has a Data Protection Officer (DPO), who ensures compliance of the processing of personal data with the legislation in force, and is available through the following email address epd@ua.pt.

Close