Use of sludge generated in the water filtration process as workability adjuvant of single coating mortars

  1. Home
  2. Interface

Patent Details

Publication Number
PT103263
Priority Date
2005-04-20
Publication Date
2006-10-31
International Patent Classification
C04B18/04

Figures

figura
Mortar with distinct formulations flow test on testing table.

Abstract

The present invention relates to the use of sludge generated in the process of filtration and treatment of potable water as a workability adjuvant (setting retarder) of industrial mortars, in replacement of bentonites with a high commercial value. The proper operation control of water treatment system ensures reasonable consistency of properties in terms of particle size and chemical composition. The sludge can be used as it is processed or after prior drying, and after addition of sodium tripolyphosphate (up to 25% by weight). 


Industrial mortars formulations containing sludge up to 0.5% have setting times comparable or even greater than industrial formulations to which bentonite has been added. Also the manipulating range in the fresh state is compatible with needs. This solution also presents environmental added value, translated in the recycling of waste in the form of high commercial value additive.

Innovative aspects & main advantages

The slurry generated in the process of filtration of water is used as an additive in the work activity of mortar employed for coating or facing operations, as a retarder of hardening, in industrial monolayer rendres, in substitution of bentonites of high commercial value, correct control of the function of the water treatment system, ensuring the reasonable constancy of properties in terms of granulometry and chemical composition.
The slurry can be used as such and processed or after prior drying, to which is added up to 25 per cent by weight of sodium tripolyphosphate. Industrial formulations containing up to 0.5 per cent slurry present hardening starting times comparable to or even greater than industrial formulations to which bentonite has been added. The manipulating period in the fresh state is compatible with necessities. This solution presents even more ambiental merits, translated into the recycling of a residue comprising an additive of high commercial value.

Applications

The main application of this invention (the potential commercial/industrial sectors) is focused on the producers of sludge (as an alternative to landfill) and to mortar and concrete producers (as end users).

Inventors

Batista, João

Our Inventors

foto João António Labrincha Baptista

João António Labrincha Baptista

Full professor

Applicant

Universidade de Aveiro

Groups Involved

G4 - Renewable Materials and Circular Economy

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