Asphalt Pavement Industry Survey on Recycled Materials and Warm-Mix Asphalt Usage: 2014

沥青 压实 沥青路面 软件部署 废物管理 环境科学 工程类 土木工程 岩土工程 地图学 软件工程 地理
作者
Kent R Hansen,Audrey Copeland
链接
摘要

A shared goal of the Federal Highway Administration (FHWA) and the National Asphalt Pavement Association (NAPA) is to support and promote sustainable practices, such as pavement recycling and warm-mix asphalt (WMA). The use of recycled materials, primarily reclaimed asphalt pavement (RAP) and reclaimed asphalt shingles (RAS), in asphalt pavements reduces the amount of new materials required to produce asphalt mixes, as well as the stream of material going to landfills. This is vital to the mission of environmental stewardship and extending the service life of the nation’s infrastructure while lowering overall costs. WMA technologies have been introduced to reduce the production and compaction temperatures for asphalt mixtures as a means of reducing the energy needed and emissions associated with mix production. Additional benefits include improved compaction of asphalt mixtures leading to improved pavement performance, as well as a longer paving season. As part of FHWA’s Every Day Counts initiative, WMA was chosen for accelerated deployment in federal-aid highway, state department of transportation (DOT), and local road projects. It is important for the industry to document the deployment of these technologies to understand where they are being used and where they may be underutilized. FHWA has established a mechanism for tracking the use of recycled materials and WMA in asphalt pavements. This mechanism has established a baseline for RAP, RAS, and WMA usage and has tracked the growth of the use of these sustainable practices in the highway industry since 2009. The objective of this tracking is to quantify the use of recycled materials and WMA produced annually by the asphalt pavement industry. Results show significant growth in the use of RAP, RAS, and WMA technologies from 2009 through 2014. The asphalt industry remains the country’s most diligent recycler by recycling asphalt pavements at a rate of over 99 percent. The average percentage of RAP used in asphalt mixtures has increased from 15.6 percent in 2009 to 20.4 percent in 2014. In 2014, the estimated RAP tonnage used in asphalt mixes was 71.9 million tons. Assuming 5 percent liquid asphalt in RAP, this represents over 3.6 million tons (20 million barrels) of asphalt binder conserved along with replacing some 68 million tons of virgin aggregate. The combined saving of asphalt binder ($550/ton) and aggregate ($9.50/ton) by using RAP and RAS in asphalt mixes is more than $2.8 billion. This keeps asphalt pavement mixture costs competitive and allows owners to achieve more roadway maintenance and construction activities within limited budgets. In 2014, WMA was about one-third of the total asphalt mixture market. WMA use increased by nearly 7 percent from 2013 to 2014, and about 577 percent since 2009. Plant foaming is used most often in producing WMA, with over 84 percent of the market. WMA additives accounted for about 16 percent of the market.

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
大幅提高文件上传限制,最高150M (2024-4-1)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
安静的翩跹完成签到 ,获得积分10
刚刚
yu发布了新的文献求助10
刚刚
健忘静曼发布了新的文献求助10
1秒前
1秒前
1秒前
王为森发布了新的文献求助10
2秒前
3秒前
3秒前
AUK发布了新的文献求助10
3秒前
4秒前
我是老大应助粱乘风采纳,获得10
4秒前
4秒前
kaan发布了新的文献求助10
4秒前
甜甜友容完成签到,获得积分10
5秒前
5秒前
独特的绯发布了新的文献求助10
5秒前
CC完成签到 ,获得积分10
6秒前
honghong发布了新的文献求助10
6秒前
weihe完成签到 ,获得积分10
6秒前
Nina完成签到,获得积分10
7秒前
青衣北风发布了新的文献求助10
8秒前
弄香发布了新的文献求助10
8秒前
粥粥发布了新的文献求助10
9秒前
9秒前
上官若男应助pxj采纳,获得10
11秒前
八块腹肌完成签到,获得积分20
11秒前
11秒前
自然的凝荷完成签到,获得积分20
13秒前
13秒前
舒适大碗完成签到 ,获得积分10
13秒前
慕青应助AUK采纳,获得10
14秒前
酷波er应助yy采纳,获得10
14秒前
LILIN发布了新的文献求助10
14秒前
沐心完成签到,获得积分10
14秒前
kaan完成签到,获得积分20
14秒前
TANGTANG发布了新的文献求助10
15秒前
hh完成签到 ,获得积分10
17秒前
知趣完成签到 ,获得积分10
18秒前
医小邦完成签到 ,获得积分10
20秒前
科研通AI2S应助TANGTANG采纳,获得10
21秒前
高分求助中
Sustainability in Tides Chemistry 2000
Microlepidoptera Palaearctica, Volumes 1 and 3 - 13 (12-Volume Set) [German] 1122
Дружба 友好报 (1957-1958) 1000
The Data Economy: Tools and Applications 1000
Mantiden - Faszinierende Lauerjäger – Buch gebraucht kaufen 600
PraxisRatgeber Mantiden., faszinierende Lauerjäger. – Buch gebraucht kaufe 600
A Dissection Guide & Atlas to the Rabbit 600
热门求助领域 (近24小时)
化学 医学 生物 材料科学 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 基因 遗传学 催化作用 物理化学 免疫学 量子力学 细胞生物学
热门帖子
关注 科研通微信公众号,转发送积分 3106352
求助须知:如何正确求助?哪些是违规求助? 2757369
关于积分的说明 7644699
捐赠科研通 2411634
什么是DOI,文献DOI怎么找? 1279512
科研通“疑难数据库(出版商)”最低求助积分说明 617805
版权声明 599271