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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 Clayton, Missouri

The architecture of central Clayton reflects its economic activity and eras of growth. An impressive collection of mid-century modern low and high rise structures contrast with earlier mansions, stores and flats. Its surrounding residential neighborhoods maintain a dense, walkable character and were largely developed in the prewar era. These neighborhoods consist of brick walkups, apartment buildings, mansions and modest single family homes centered around several small business districts.

Claverach Park is a residential neighborhood bounded by Wydown Boulevard on the north, Ridgemoor Drive and Big Bend Boulevard on the east, Clayton Road on the south, and Audubon Drive on the west. The neighborhood was planned in the early 1920s by Julius Pitzman who avoided a traditional street grid in favor of curvilinear streets lined by stately trees, one centrally located neighborhood park, and 9 pocket parks. Oak Knoll Park, Clayton's second largest park and the former home to the St. Louis Academy of Science, is located in the neighborhood.

Clayshire is a suburban neighborhood bounded by Forest Park Parkway on the north, Interstate 170 on the east, Clayton Road on the south and the Ladue city limit to the west and includes the subdivision of Tanglewood. Unlike Clayton's denser prewar residential neighborhoods, Clayshire is characterized by a more postwar suburban development pattern. Neighborhood parks include Anderson Park, Clayshire Park, and Whitburn Park as well as a pedestrian underpass beneath I-170 that connects to Shaw Park. There is a small commercial area at the intersection of Clayton Road and Brentwood Boulevard.

A large residential neighborhood, Davis Place is characterized primarily by single family homes with some apartment buildings along Hanley Road and Brentwood Boulevard. Its boundaries are Forest Park Parkway on the north, Hanley Road on the east, Clayton Road on the south, and Brentwood Boulevard on the west. The neighborhood includes the subdivisions Country Club Place, Country Club Court, and Remmerts. Davis Place is also home to the Shops of Clayton commercial corridor along Clayton Road.

Part of the Hi-Pointe–DeMun Historic District, DeMun is primarily a residential neighborhood on the eastern edge of Clayton. It is a dense and walkable neighborhood characterized by brick and limestone prewar apartment blocks, single family homes and small commercial areas centered around DeMun Avenue and Clayton Road. The neighborhood is also home to Concordia Seminary, the South Campus of Washington University, and three public parks (Concordia, DeMun, and Henry Wright).

The boundaries of DeMun in Clayton are Concordia Seminary's northern property line and Northwood Avenue, the St. Louis city limit to the east, Clayton Road to the south, and Big Bend Boulevard to the west.

Downtown Clayton is the seat of St. Louis County government and home to its headquarters campus. In addition, the neighborhood is home to four of the St. Louis region's seven Fortune 500 headquarters; Centene Corporation, Emerson Electric, Graybar, and Olin Corporation. Commerce Bank, Energizer, the Regional Business Council and the St. Louis Club are located here as well. Downtown Clayton is known for its many restaurants and cafes and hosts the St. Louis Art Fair during September each year. Recently, the neighborhood has entered a period of significant redevelopment and new construction with the opening of the Two Twelve Clayton and Ceylon apartment buildings in 2017, Centene Plaza C in 2019, and Forsyth Pointe in 2023. As of 2022, downtown Clayton had seven projects, worth approximately $600 million, either in development or under construction.

The boundaries of downtown Clayton are Maryland Avenue on the north, the University City limit on the east, Forest Park Parkway on the south, and Brentwood Boulevard on the west. The neighborhood is served by MetroLink via the Blue Line at the Clayton and Forsyth stations.

Like Clayton's other urban, walkable neighborhoods, the Moorlands is characterized by large, prewar masonry apartment buildings and single family homes with high-rise apartment buildings along Hanley Road and a small commercial district at the intersection of Hanley and Wydown Boulevard. Most of the single family homes are concentrated east of Glenridge Drive while most of the apartment buildings are concentrated to the west. The neighborhood's boundaries are Wydown Boulevard on the north, Audubon Drive on the east, Clayton Road on the south, and Hanley Road on the west.

North Clayton is a dense, walkable set of neighborhoods that encompass all of Clayton north of Maryland Avenue. The area is mostly made up of densely packed single family homes with office, apartment and condo buildings located primarily between Meramec Avenue and Brentwood Boulevard. Commercial corridors include Meramec and Maryland avenues. The neighborhood is home to Kol Rinah synagogue, St. Joseph Catholic Church, the Mid County branch of the St. Louis County Library, and Centene's corporate training center. Neighborhood parks include Taylor Park and Hanley Park which includes the historic Hanley House.

Subdivisions within North Clayton include the Bemiston additions, Clayton Gardens, Colonial Park, Hanley Place, and Maryland Terrace. Its boundaries to the north and east are the city limits with University City, its southern boundary is Maryland Avenue, and its western boundary is the Ladue city limit.

Other neighborhoods and subdivisions within Clayton include Brentmoor and Brentmoor Park, Carrswold, Ellenwood, Forest Ridge, Hillcrest, Parkside, Skinker Heights, Southmoor, Tesson, Tuscany Park, Wydown Forest, and Wydown Terrace.

In the St. Louis region, Clayton is well known for housing a wealthy, educated, professional, and often dual-income population.

The 2020 United States census counted 17,355 people, 5,587 households, and 3,275 families in Clayton. The population density was 6,914.3 per square mile (2,674.1/km). There were 6,061 housing units at an average density of 2,414.7 per square mile (933.9/km). The racial makeup was 71.37% (12,386) white, 8.07% (1,400) black or African-American, 0.16% (28) Native American, 12.88% (2,235) Asian, 0.01% (2) Pacific Islander, 1.04% (181) from other races, and 6.47% (1,123) from two or more races. Hispanic or Latino of any race was 3.6% (609) of the population.

Of the 5,587 households, 28.8% had children under the age of 18; 50.2% were married couples living together; 27.8% had a female householder with no husband present. Of all households, 34.5% consisted of individuals and 10.4% had someone living alone who was 65 years of age or older. The average household size was 2.2 and the average family size was 2.9.

16.8% of the population was under the age of 18, 25.4% from 18 to 24, 21.7% from 25 to 44, 21.3% from 45 to 64, and 11.3% who were 65 years of age or older. The median age was 29.5 years. For every 100 females, the population had 97.9 males. For every 100 females ages 18 and older, there were 96.2 males.

The 2016-2020 5-year American Community Survey estimates show that the median household income was $108,387 (with a margin of error of +/- $9,440) and the median family income was $157,621 (+/- $21,434). Males had a median income of $54,146 (+/- $10,043) versus $36,023 (+/- $10,664) for females. The median income for those above 16 years old was $42,336 (+/- $3,903). Approximately, 6.2% of families and 8.0% of the population were below the poverty line, including 5.2% of those under the age of 18 and 2.8% of those ages 65 or over.

As of the census of 2010, there were 15,939 people, 5,322 households, and 2,921 families living in the city. The population density was 6,427.0 inhabitants per square mile (2,481.5/km). There were 6,321 housing units at an average density of 2,548.8 per square mile (984.1/km). The racial makeup of the city was 78.0% White, 8.2% African American, 0.2% Native American, 10.8% Asian, 0.4% from other races, and 2.4% from two or more races. Hispanic or Latino of any race were 3.1% of the population.

There were 5,322 households, of which 26.3% had children under the age of 18 living with them, 46.3% were married couples living together, 6.7% had a female householder with no husband present, 1.9% had a male householder with no wife present, and 45.1% were non-families. 37.5% of all households were made up of individuals, and 11.2% had someone living alone who was 65 years of age or older. The average household size was 2.12 and the average family size was 2.86.

The median age in the city was 29.2 years. 15.8% of residents were under the age of 18; 27.6% were between the ages of 18 and 24; 23.3% were from 25 to 44; 21.6% were from 45 to 64; and 11.8% were 65 years of age or older. The gender makeup of the city was 50.9% male and 49.1% female.

As of the census of 2000, there were 12,825 people, 5,370 households, and 2,797 families living in the city. The population density was 5,164.4 inhabitants per square mile (1,994.0/km). There were 5,852 housing units at an average density of 2,356.5 per square mile (909.8/km). The racial makeup of the city was 84.94% White, 7.77% Black or African American, 0.12% Native American, 5.62% Asian, 0.03% Pacific Islander, 0.29% from other races, and 1.22% from two or more races. Hispanic or Latino of any race were 1.49% of the population.

There were 5,370 households, out of which 25.9% had children under the age of 18 living with them, 43.4% were married couples living together, 6.7% had a female householder with no husband present, and 47.9% were non-families. 40.4% of all households were made up of individuals, and 11.8% had someone living alone who was 65 years of age or older. The average household size was 2.09 and the average family size was 2.90.

In the city, the population was spread out, with 20.1% under the age of 18, 10.7% from 18 to 24, 32.3% from 25 to 44, 22.6% from 45 to 64, and 14.3% who were 65 years of age or older. The median age was 37 years. For every 100 females, there were 100.5 males. For every 100 females age 18 and over, there were 98.0 males.

The median income for a household in the city was $64,184, and the median income for a family was $107,346. Males had a median income of $64,737 versus $42,757 for females. The per capita income for the city was $48,055. About 5.0% of families and 7.7% of the population were below the poverty line, including 9.5% of those under age 18 and 3.2% of those age 65 or over.

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