TECHNICAL COMMISSION 3 - NATURAL STONE AND ARTIFICIAL STONE
General
Currently 4 working groups are dealing on the topics:
- Coatings on natural stone - retouching, setting and slurry
(WG 3.8 Application technology in natural stone restoration) - Salt reduction of porous building materials (WG 3.13)
- Repair of natural stone floor coverings (WG 3.19)
- Repair of bricks and brickwork (WG 3.20)
Discussions are currently underway with colleagues to set up a working group on the problem of slip resistance on natural stone surfaces.
It is planned to update the WTA recommendations 3-9-95/D "Assessment of cleaned stone surfaces ", 3-10-97/D "Cadastral maps to characterise the state and material properties of stone buildings".
Guidelines
The following guideliness have been published by the technical commission “Natural Stone and Artifical Stone”:
| 3-5 Edition: 09.1998/D | Restoration for natural stone according to WTA I: Cleaning |
| 3-7 Edition: 10.1997/D | Technology of restoration of natural stone: Production of copies by moulding |
| 3-8 Edition: 09.1997/D | Restoration of natural stones according to WTA II: Restoration and replacement of natural stone |
| 3-9 Edition: 07.1997/D | Assessment of cleaned stone surfaces |
| 3-10 Edition: 09.1998/D | Restoration for natural stone according to WTA XII: Cadastral maps to characterise the state and material properties of stone buildings |
| 3-11 Edition: 09.1997/D | Restoration for natural stone according to WTA III: Restoring natural stones by restoration mortars or restoration materials |
| 3-12 Edition: 10.2016/D | Restoration for natural stone: Masonry joint repair |
| 3-13 Edition: 12.2019/D | Desalination of porous building material by means of poultices |
| 3-15 Edition: 05.2014/D | Restoration of In-Situ Terrazzo |
| 3-16 Edition: 12.2009/D | Restoration of artificial stone |
| 3-17 Edition: 06.2010/D | Water-repelling impregnation of mineral building materials |
| 3-18 Edition: 09.2014/D | Monitoring of natural stone buildings and monuments |
| 3-19 Edition: 10.2016/D | Restoration of interior natural stone tiled floors |
| 3-20 Edition: 09.2026/D | Restoration of historic brickwork |
| E-3-21 Edition: 10.2026/D | Investigation of mineral building materials using drilling resistance measurement techniques |