Assessment the Potential of Using Carbon Nanotubes Reinforcements for Improving the Tensile/Flexural Strength and Fracture Toughness of Portland Cement Paste for Damage Resistant Concrete Transportation Infrastructures

Abu Al-Rub, Rashid K.; Tyson, Bryan M.; Texas Transportation Institute; Texas A & M University

Advanced Search

Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

Advanced Search
Custom Query

All these words:

For very narrow results

This exact word or phrase:

When looking for a specific result

Any of these words:

Best used for discovery & interchangable words

None of these words:

Recommended to be used in conjunction with other fields

Language:

Dates

Publication Date Range:

to

Document Data

Title:

Document Type:

Library

Collection:

Series:

People

Author:

Clear All

Query Builder

Query box

Clear All

For additional assistance using the Custom Query please check out our Help Page

i

Assessment the Potential of Using Carbon Nanotubes Reinforcements for Improving the Tensile/Flexural Strength and Fracture Toughness of Portland Cement Paste for Damage Resistant Concrete Transportation Infrastructures

2010-09-01
By Abu Al-Rub, Rashid K. ; Tyson, Bryan M.

[PDF-10.49 MB]

Select the Download button to view the document

This document is over 5mb in size and cannot be previewed

English

Details You May Also Like

Details:

Creators:

Abu Al-Rub, Rashid K. ; Tyson, Bryan M.

Abu Al-Rub, Rashid K. ; Tyson, Bryan M. Less -
Corporate Creators:

Texas Transportation Institute ; Texas A & M University

Texas Transportation Institute ; Texas A & M University Less -
Corporate Contributors:

Southwest Region University Transportation Center (U.S.) ; University Transportation Centers Program (U.S.)

Southwest Region University Transportation Center (U.S.) ; University Transportation Centers Program (U.S.) Less -
Subject/TRT Terms:

[+]

Carbon Nanotubes, Carbon Nanofibers, Cement, Dispersion, Fracture, Concrete Construction Concrete Structures Nano Reinforcements Nanostructured Materials Portland Cement Concrete
Publication/ Report Number:

SWUTC/10/476660-00011-1
Resource Type:

Tech Report
Geographical Coverage:

Texas
Edition:

Final Report
Corporate Publisher:

Southwest Region University Transportation Center (U.S.)
Abstract:

The focus of this study was on exploring the use of nanotechnology-based nano-filaments, such as carbon nanotubes (CNTs) and nanofibers (CNFs), as reinforcement in improving the mechanical properties of Portland cement paste as a construction material. Due to their ultra-high strength and very high aspect ratios, CNTs and CNFs have been used as excellent reinforcements in enhancing the physical and mechanical properties of polymer, metallic, and ceramic composites. Very little attention has been devoted to explore the use of nanofilaments in the transportation industry. Therefore, this study aimed to bridge the gap between nano-filaments and transportation materials. This was achieved by testing the integration of CNTs and CNFs in ordinary Portland cement paste through state-of-the-art techniques. Different mixes in fixed proportions (e.g. water-to-cement ratio, air content, admixtures) along with varying concentrations of CNTs or CNFs were prepared. Different techniques commonly used for other materials (like polymers) were used in achieving uniform dispersion of nano-filaments in the cement paste matrix and strong nano-filaments/cement bonding. Small-scale specimens were prepared for mechanical testing in order to measure the modified mechanical properties as a function of nano-filaments concentration, type, and distribution. With 0.1% CNFs, the ultimate strain capacity increased by 142%, the flexural strength increased by 79%, and the fracture toughness increased by 242%. A scanning electron microscope (SEM) was used to discern the difference between crack bridging and fiber pullout. Test results showed that the strength, ductility, and fracture toughness can be improved with the addition of low concentrations of either CNTs or CNFs.
Format:

PDF
Funding:

DTRT07-G-0006
Collection(s):

University Transportation Centers US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:01ccad590e47d113a8a81543be0cb4bb82739e02b84e102e6be31a8d285154bf
Download URL:

https://rosap.ntl.bts.gov/view/dot/20438/dot_20438_DS1.pdf
File Type:

No Additional Files

More +

Assessment the Potential of Using Carbon Nanotubes Reinforcements for Improving the Tensile/Flexural Strength and Fracture Toughness of Portland Cement Paste for Damage Resistant Concrete Transportation Infrastructures

Details:

Supporting Files

You May Also Like