Evaluating the effect of Crumb rubber and Nano silica on the properties of High volume fly Ash Roller compacted concrete pavement using Non-destructive Techniques

(چکیده مقاله) :
Abstract :

The major problems related to roller compacted concrete (RCC) pavement are high rigidity,
lower tensile strength which causes a tendency of cracking due to thermal or plastic shrinkage,
flexural and fatigue loads. Furthermore, RCC pavement does not support the use of dowel bars
or reinforcement due to the way it is placed and compacted, these also aided in cracking and
consequently increased maintenance cost. To address these issues, high volume fly ash (HVFA)
RCC pavement was developed by partially replacing 50% cement by volume with fly ash.
Crumb rubber was used as a partial replacement to fine aggregate in HVFA RCC pavement at
0%, 10%, 20%, and 30% replacement by volume. Nano silica was added at 0%, 1%, 2% and 3%
by weight of cementitious materials to improve early strength development in HVFA RCC
pavement and mitigate the loss of strength due to the incorporation of crumb rubber. The
nondestructive technique using the rebound hammer test (RHT) and ultrasonic pulse velocity
(UPV) were used to evaluate the effect of crumb rubber and nano silica on the performance of
HVFA RCC pavement. The results showed that the use of HVFA as cement replacement
decreases both the unit weight, compressive strength, rebound number (RN). Furthermore, the
unit weight, compressive strength, RN, UPV and dynamic modulus of elasticity of HVFA RCC
pavement all decreases with increase in crumb rubber content and increases with the addition of
nano-silica. Combined UPV-RN (SonReb) models for predicting the 28 days strength of HVFA
RCC pavement based on combining UPV and RN were developed using mul

(توضیحات تکمیلی) :

(توضیحات تکمیلی) :
Description :

مقاله ISI انگلیسی اصلی
سال انتشار:2018
فایل ISI انگلیسی اصلی ، با فرمت Pdf
تعداد صفحات فایل ISI انگلیسی اصلی: 26 صفحه

Authors / Descriptions(نویسندگان/توضیحات): مقاله ISI سال انتشار2018 \ Authors: Bashar S. Mohammed, Musa Adamu, Mohd Shahir Liew
Sent date(تاریخ ارسال) : 1397/10/26  |   1/16/2019
Number of visits(تعداد بازدید): 774
Key words (کلمات کلیدی): Crumb rubber; High volume fly ash; Nano silica; Roller compacted concrete pavement; Ultrasonic pulse velocity; Rebound number
Number of pages(تعداد صفحات) : 26
نظرات کاربران در مورد این آگهی
در حال حاضر هیچ نظری ثبت نگردیده است .
ارسال پیام

مقالات مرتبط