Healing Agent in Cement-Based Materials and Structures, and Process for Its Preparation
a cement-based material and cement-based technology, applied in the direction of sustainable waste treatment, inorganic carrier, paints with biocides, etc., can solve the problems of inability to propose or apply the potential storage capacity of porous materials for healing or repair agents, such as chemical compounds or bacteria, and the possibility of reducing the viability of procedures
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
Problems solved by technology
Method used
Examples
example 1
[0034]Application of expanded clay particles loaded with Bacillus pseudofirmus spores and calcium lactate solution to decrease permeability of cracked concrete.
[0035]The produced spores of a Bacillus pseudofirmus DSM 8715 culture in its late exponential growth phase are harvested by centrifugation (20 minutes at 10000 g). The obtained pellet, containing cells and spores, is washed once by re-suspension of the pellet in tap water followed by an additional centrifugation step. The washed pellet is subsequently re-suspended in an aliquot of tap water to obtain a suspension with a density of 3·1010 spores ml−1. A batch of crushed expanded clay particles (e.g. Liapor®, Liapor GmbH & Co. KG Hallendorf, Germany) with an average particle size of 0.05 mm is dried overnight at a temperature of about 140° C. followed by cooling to room temperature. An amount of this batch is subsequently brought under partial vacuum, after which 1 ml of a 3·1010 spores ml−1 spore suspension is added per 16.5 g...
example 2
[0038]Application of expanded clay particles loaded with Sporosarcina pasteurii spores as healing agent in concrete.
[0039]In this example expanded clay particle-immobilized spores of ureolytic bacteria such as Sporosarcina pasteurii DSM 33 act as healing catalyst in cracked concrete, while the calcite precursor compound mixture (a mixture of urea, calcium acetate and peptone) is applied externally. The produced spores of a Sporosarcina pasteurii DSM 33 culture are immobilized in expanded crushed clay (e.g., Liapor®) particles using the procedure as described under example 1. The 0.05 mm sized S. pasteurii spore-containing particles (1.8·109 spores / gram particles) are added to the concrete mixture in a proportion of 5.4 kg per 1 m3 concrete mixture. Surface cracks in set and aged concrete can subsequently be healed by immersion or spraying the concrete surface with the urea, calcium acetate, peptone mixture (10, 27 and 0.5 g / L water respectively). The organics acetate and peptone of ...
PUM
| Property | Measurement | Unit |
|---|---|---|
| Temperature | aaaaa | aaaaa |
| Temperature | aaaaa | aaaaa |
| Diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More