Preparation method of anti-crack low-shrinkage cement mortar
A cement mortar and low shrinkage technology, applied in the field of cement mortar materials, can solve the problems of low compressive strength, poor crack resistance, and easy microcracks, etc., and achieve the effect of improving dispersion performance and improving hydrophilicity
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Example Embodiment
[0028] Example 1
[0029] Preparation of coarse wood flour:
[0030] Take 200g of straw residue and 400mL of 45% sodium hydroxide solution into a water bath reactor with a stirrer, heat the water bath to 90℃, start the stirrer, stir for 3h, filter, remove the filter residue and use the resulting filtrate Glacial acetic acid with a mass fraction of 95% was neutralized to neutrality to obtain a lignin suspension. Centrifuge at a high speed of 3500r / min for 12min to remove the supernatant and separate the lower precipitate. Wash the precipitate twice with water and place Set the temperature to 70℃ in an oven, dry for 4 hours to obtain coarse wood flour;
[0031] Product preparation:
[0032] In parts by weight, add 70 parts of β-cyclodextrin and 100 parts of 90% sodium hydroxide solution to the beaker, stir at room temperature for 10 minutes, and then add 5 parts of glycidyl trimethyl chloride Ammonium, place the beaker in a water bath, heat to 50°C, keep the reaction temperature for 3...
Example Embodiment
[0039] Example 2
[0040] Preparation of coarse wood flour:
[0041] Take 215g of straw residue and 425mL of 45% sodium hydroxide solution into a water bath reactor with a stirrer, heat the water bath to 92.5℃, start the stirrer, stir for 4h, filter, remove the filter residue and use the resulting filtrate The glacial acetic acid with a mass fraction of 95% was neutralized to neutrality to obtain a lignin suspension. The lignin suspension was centrifuged at a speed of 3600r / min and high-speed centrifugation for 13.5min. The supernatant was removed, and the lower layer was separated. Dry for 4.5 hours in an oven with a set temperature of 75°C to obtain coarse wood flour;
[0042] Product preparation:
[0043] In parts by weight, add 72.5 parts of β-cyclodextrin and 115 parts of 90% sodium hydroxide solution to the beaker. After stirring for 12.5 minutes at room temperature, add 7.5 parts of epoxypropyltrimethyl chloride. For ammonium hydroxide, place the beaker in a water bath, heat ...
Example Embodiment
[0050] Example 3
[0051] Preparation of coarse wood flour:
[0052] Take 230g of straw residue and 450mL of 45% sodium hydroxide solution into a water bath reactor with a stirrer, heat the water bath to 95℃, start the stirrer, stir for 5h, filter, remove the filter residue and use the resulting filtrate Glacial acetic acid with a mass fraction of 95% was neutralized to neutrality to obtain a lignin suspension. Centrifuge at a high speed of 3700r / min for 15 minutes to remove the supernatant and separate the lower precipitate. After washing the precipitate 3 times with water, place it in Set the temperature to 80℃ in an oven, dry for 5 hours to obtain coarse wood flour;
[0053] Product preparation:
[0054] In parts by weight, add 75 parts of β-cyclodextrin and 130 parts of 90% sodium hydroxide solution to the beaker, stir at room temperature for 15 minutes, and then add 10 parts of glycidyl trimethyl chloride Ammonium, place the beaker in a water bath, heat to 55°C, keep the temper...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap