About Crack Sealing
How to Evaluate the Effectiveness of Asphalt Crack Sealing
The process of asphalt crack sealing is a great way to improve the appearance of your driveway or parking lot. There are several factors to consider before choosing the right type of sealant: cost, environmental impact, and quality. Listed below are some of the main factors to consider. Once you've decided which method to use, you can move forward to the next step: evaluating the quality of sealants and the effectiveness of your crack sealing project.
Cost-effectiveness
To determine the effectiveness of different methods of crack sealing, researchers have analyzed the performance of unsealed and sealed pavement. Most studies have focused on unsealed pavement and found that sealing improves pavement performance. However, not many studies have compared the cost-benefit of different techniques. This research aims to address this gap. In this article, we will discuss the differences and similarities between these two methods.
Although it is an important preventive maintenance strategy, pavement experts differ on which method is more cost-effective. Using literature review, a survey, and field performance data, researchers have developed a cost-effectiveness guideline for pavement crack sealing. The results from this study provide a basis for comparing the various methods. Crack sealing is also more expensive than crack filling. Despite its initial high cost, crack sealing may offer longer service. More research is needed to determine whether higher performance materials are truly beneficial.
Environmental impact
While asphalt crack sealing may not have a negative environmental impact, it can have a detrimental impact on pavements. When applied improperly, crack sealing can cause damage to asphalt pavements due to moisture entrapment. Unlike other types of surface treatments, crack sealing prevents water from escaping upwards. In fact, crack sealing can reduce the lifespan of pavements by 1.1 to 2 years. This can lead to an increase in maintenance and rehabilitation costs.
This study shows that a crack seal technique can reduce emissions of nitrogen oxide and sulphur dioxide by 50 percent. However, the crack seal method has the lowest overall emission reduction. The researchers suggest that all methods of preventive maintenance reduce carbon dioxide emissions. They recommend that new pavement studies incorporate sustainable pavement management components and consider the environmental impact of asphalt crack sealing. The study concludes that future pavements must incorporate a comprehensive life-cycle assessment to evaluate their overall environmental impact.
Quality of sealant
When determining the quality of asphalt crack sealant, consider the following factors: Size, shape, moisture content, and repair method. Crack sealant's success depends on several factors. Generally, a crack less than 20% in crack density requires a more flexible product. In contrast, a larger crack density requires a stiffer sealant. In addition, sealant's tackiness decreases after it has been cured.
When choosing an asphalt crack filler, make sure to choose one with the right adhesive properties. Asphalt filler is not rubberized, and it might dislodge if the pavement moves. Sealant, on the other hand, expands and contracts with the pavement. If the crack filler doesn't expand and contract with the pavement, it is not the right choice. For this reason, choosing a high-quality asphalt crack filler is imperative.
About Hazelwood, Missouri
Hazelwood is a city in St. Louis County, Missouri, within Greater St. Louis. It is a second-ring northern suburb of St. Louis. Based on the 2020 United States census, the city had a total population of 25,485. It is located north of St. Louis-Lambert International Airport and is situated on Interstates 270 and 170, as well as the much-traveled Lindbergh Boulevard and Highway 370.
According to the United States Census Bureau, the city has a total area of 16.76 square miles (43.41 km), of which 16.02 square miles (41.49 km2) is land and 0.74 square miles (1.92 km) is water.
As of the census of 2010, there were 25,703 people, 10,933 households, and 6,608 families living in the city. The population density was 1,604.4 inhabitants per square mile (619.5/km2). There were 11,730 housing units at an average density of 732.2 per square mile (282.7/km). The racial makeup of the city was 64.1% White, 30.5% African American, 0.3% Native American, 1.4% Asian, 1.2% from other races, and 2.5% from two or more races. Hispanic or Latino of any race were 3.0% of the population.
There were 10,933 households, of which 31.2% had children under the age of 18 living with them, 38.3% were married couples living together, 17.3% had a female householder with no husband present, 4.8% had a male householder with no wife present, and 39.6% were non-families. 33.7% of all households were made up of individuals, and 10.4% had someone living alone who was 65 years of age or older. The average household size was 2.34 and the average family size was 3.01.
The median age in the city was 36.8 years. 23.2% of residents were under the age of 18; 9.9% were between the ages of 18 and 24; 27% were from 25 to 44; 27.2% were from 45 to 64; and 12.4% were 65 years of age or older. The gender makeup of the city was 47.0% male and 53.0% female.
The median household income was $47,838, and the median family income was $57,293. Males had a median income of $42,399 compared with $35,800 for females. The per capita income for the city was $24,651. About 8.3% of families and 9.3% of the population were below the poverty line, including 15.2% of those under age 18 and 4.9% of those age 65 or over.
As of the census of 2000, there were 26,206 people, 10,954 households, and 6,714 families living in the city. The population density was 1,649.9 inhabitants per square mile (637.0/km2). There were 11,433 housing units at an average density of 719.8 per square mile (277.9/km). The racial makeup of the city was 80.24% White, 16.04% African American, 1.19% Asian, 0.18% Native American, 0.06% Pacific Islander, 0.52% from other races, and 1.76% from two or more races. Hispanic or Latino of any race were 1.60% of the population.
There were 10,954 households, out of which 29.6% had children under the age of 18 living with them, 44.4% were married couples living together, 12.7% had a female householder with no husband present, and 38.7% were non-families. 32.1% of all households were made up of individuals, and 9.7% had someone living alone who was 65 years of age or older. The average household size was 2.38 and the average family size was 3.05.
In the city, the population was spread out, with 24.6% under the age of 18, 9.7% from 18 to 24, 31.7% from 25 to 44, 22.4% from 45 to 64, and 11.6% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 92.3 males. For every 100 women age 18 and over, there were 89.0 men.
The median income for a household in the city was $45,110, and the median income for a family was $52,656. Males had a median income of $40,031 versus $27,871 for females. The per capita income for the city was $22,311. About 4.3% of families and 6.3% of the population were below the poverty line, including 8.1% of those under age 18 and 7.2% of those age 65 or over.
Hazelwood is covered by the Hazelwood public school district. The city has one high school, Hazelwood West. The city also has one middle school, Hazelwood West Middle School, and several elementary schools (McNair, Russell and Garrett). There is also one Early Childhood Education Center in Hazelwood.
There are also several private schools in Hazelwood; Alphabet Soup Academy, Asa Christian Academy, Blossom Wood Day School, and Oak Bridge.
Gateway Legacy Christian Academy, an international boarding school with students from over 30 countries, is presently located at the historic former St. Stanislaus Seminary.
St. Louis County Library operates the Prairie Commons Branch in Hazelwood.
Due to its location along Interstate 270 between Interstate 170 and Missouri 370, as well as adjacency to St. Louis-Lambert International Airport, Hazelwood is a major regional hub for manufacturing, distribution, and office facilities. The city is home to a substantial workforce with 17,063 jobs as of 2015, according to the U.S. Census Bureau.
The city was home to a Ford plant from 1948 to 2006 and employed 1,400 at the time of closure. The site of the former plant is in the process of being redeveloped into Aviator Business Park. On the opposite side of Lindbergh Blvd., after the completion of one building in 2007, the Great Recession and ownership troubles stalled the now-named Hazelwood Logistics Center until the land was sold in 2015. The new owners finishing building out the park with a total of 1.8 million square feet of industrial space completed and leased between 2015 and mid-2018. The industrial park is expected to generate 1,800 jobs. TradePort is a 325-acre industrial park under construction north of the St. Louis Outlet Mall (formerly St. Louis Mills) that upon completion in the mid-2020s will feature up to 4 million square feet of new industrial development.
Hazelwood is home to the headquarters of Mallinckrodt Pharmaceuticals and several facilities for Boeing.