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Asphalt versus concrete
Which material is better for your project?
Before a public works (or street maintenance, or road repair) department can decide whether to use concrete or asphalt in a specific application, the department manager must arm himself with information to help him make the best choice.
Asphalt is more common for a department to specify than
concrete. “Asphalt over concrete – that’s the standard. It is
what has been done for so long. But because it is the “standard”
doesn’t necessarily make it the best option for all applications.
Concrete may be better in some instances, the first of which is
new construction. In urban metropolitan areas, where new roads
are being built and existing roadways are being expanded, using
concrete may be a good way to minimize future inconvenience.
Funding is a big challenge. People are looking for short-term
fixes, which have a political impact.
Asphalt also can be specified as a long-term solution. Some pavement types must be completely removed and reconstructed when they reach the end of their design life, but total removal and reconstruction due to structural failure of a thick asphalt pavement is rare. With a thick asphalt structure, it is possible to obtain a ‘Perpetual Pavement’ one that can last indefinitely, with the only rehabilitation being milling of the surface followed by an asphalt overlay. Perpetual Pavement is a relatively new type of asphalt concrete pavement designed to resist structural fatigue distress for at least 50 years. Maintenance is limited to replacement of the surface course
(http://www.pwmag.com/bridges/ asphalt-versus-concrete.aspx.20.03.2006.Adaptado)
According to the text, a thick asphalt structural failure which requires its total removal is
Asphalt versus concrete
Which material is better for your project?
Before a public works (or street maintenance, or road repair) department can decide whether to use concrete or asphalt in a specific application, the department manager must arm himself with information to help him make the best choice.
Asphalt is more common for a department to specify than
concrete. “Asphalt over concrete – that’s the standard. It is
what has been done for so long. But because it is the “standard”
doesn’t necessarily make it the best option for all applications.
Concrete may be better in some instances, the first of which is
new construction. In urban metropolitan areas, where new roads
are being built and existing roadways are being expanded, using
concrete may be a good way to minimize future inconvenience.
Funding is a big challenge. People are looking for short-term
fixes, which have a political impact.
Asphalt also can be specified as a long-term solution. Some pavement types must be completely removed and reconstructed when they reach the end of their design life, but total removal and reconstruction due to structural failure of a thick asphalt pavement is rare. With a thick asphalt structure, it is possible to obtain a ‘Perpetual Pavement’ one that can last indefinitely, with the only rehabilitation being milling of the surface followed by an asphalt overlay. Perpetual Pavement is a relatively new type of asphalt concrete pavement designed to resist structural fatigue distress for at least 50 years. Maintenance is limited to replacement of the surface course
(http://www.pwmag.com/bridges/ asphalt-versus-concrete.aspx.20.03.2006.Adaptado)
O termo but em - But because it is the “standard” doesn’t necessarily make it the best option for all applications. – implica
Asphalt versus concrete
Which material is better for your project?
Before a public works (or street maintenance, or road repair) department can decide whether to use concrete or asphalt in a specific application, the department manager must arm himself with information to help him make the best choice.
Asphalt is more common for a department to specify than
concrete. “Asphalt over concrete – that’s the standard. It is
what has been done for so long. But because it is the “standard”
doesn’t necessarily make it the best option for all applications.
Concrete may be better in some instances, the first of which is
new construction. In urban metropolitan areas, where new roads
are being built and existing roadways are being expanded, using
concrete may be a good way to minimize future inconvenience.
Funding is a big challenge. People are looking for short-term
fixes, which have a political impact.
Asphalt also can be specified as a long-term solution. Some pavement types must be completely removed and reconstructed when they reach the end of their design life, but total removal and reconstruction due to structural failure of a thick asphalt pavement is rare. With a thick asphalt structure, it is possible to obtain a ‘Perpetual Pavement’ one that can last indefinitely, with the only rehabilitation being milling of the surface followed by an asphalt overlay. Perpetual Pavement is a relatively new type of asphalt concrete pavement designed to resist structural fatigue distress for at least 50 years. Maintenance is limited to replacement of the surface course
(http://www.pwmag.com/bridges/ asphalt-versus-concrete.aspx.20.03.2006.Adaptado)
The term over in – “Asphalt over concrete” – that’s the standard. – means that
Asphalt versus concrete
Which material is better for your project?
Before a public works (or street maintenance, or road repair) department can decide whether to use concrete or asphalt in a specific application, the department manager must arm himself with information to help him make the best choice.
Asphalt is more common for a department to specify than
concrete. “Asphalt over concrete – that’s the standard. It is
what has been done for so long. But because it is the “standard”
doesn’t necessarily make it the best option for all applications.
Concrete may be better in some instances, the first of which is
new construction. In urban metropolitan areas, where new roads
are being built and existing roadways are being expanded, using
concrete may be a good way to minimize future inconvenience.
Funding is a big challenge. People are looking for short-term
fixes, which have a political impact.
Asphalt also can be specified as a long-term solution. Some pavement types must be completely removed and reconstructed when they reach the end of their design life, but total removal and reconstruction due to structural failure of a thick asphalt pavement is rare. With a thick asphalt structure, it is possible to obtain a ‘Perpetual Pavement’ one that can last indefinitely, with the only rehabilitation being milling of the surface followed by an asphalt overlay. Perpetual Pavement is a relatively new type of asphalt concrete pavement designed to resist structural fatigue distress for at least 50 years. Maintenance is limited to replacement of the surface course
(http://www.pwmag.com/bridges/ asphalt-versus-concrete.aspx.20.03.2006.Adaptado)
De acordo com o texto, o ‘Perpetual Pavement’
Asphalt versus concrete
Which material is better for your project?
Before a public works (or street maintenance, or road repair) department can decide whether to use concrete or asphalt in a specific application, the department manager must arm himself with information to help him make the best choice.
Asphalt is more common for a department to specify than
concrete. “Asphalt over concrete – that’s the standard. It is
what has been done for so long. But because it is the “standard”
doesn’t necessarily make it the best option for all applications.
Concrete may be better in some instances, the first of which is
new construction. In urban metropolitan areas, where new roads
are being built and existing roadways are being expanded, using
concrete may be a good way to minimize future inconvenience.
Funding is a big challenge. People are looking for short-term
fixes, which have a political impact.
Asphalt also can be specified as a long-term solution. Some pavement types must be completely removed and reconstructed when they reach the end of their design life, but total removal and reconstruction due to structural failure of a thick asphalt pavement is rare. With a thick asphalt structure, it is possible to obtain a ‘Perpetual Pavement’ one that can last indefinitely, with the only rehabilitation being milling of the surface followed by an asphalt overlay. Perpetual Pavement is a relatively new type of asphalt concrete pavement designed to resist structural fatigue distress for at least 50 years. Maintenance is limited to replacement of the surface course
(http://www.pwmag.com/bridges/ asphalt-versus-concrete.aspx.20.03.2006.Adaptado)
According to the text, concrete
As tubulações de água fria, de acordo com a NBR 5626, devem ser dimensionadas de modo que a velocidade da água, em qualquer trecho de tubulação, não atinja valores, medidos em m/s, superiores a
Considerando que a área de contribuição de águas pluviais de um telhado é de 50 m2, a intensidade pluviométrica é de 178 mm/h e o coeficiente de escoamento superficial igual a 1, a vazão na calha e no conduto vertical, medida em l/min, será de, aproximadamente,
De acordo com a NBR 9050, o módulo de referência da projeção ocupada por uma pessoa utilizando cadeira de rodas é de
A NBR 8160 indica as unidades de Hunter de contribuição dos aparelhos sanitários e diâmetro nominal mínimo dos ramais de descarga. No caso de chuveiro residencial e pia de cozinha, esses diâmetros mínimos, medidos em mm, são, respectivamente:
Na edição de um texto houve a necessidade de adicionar a letra grega “β”. O procedimento para essa operação será clicar em
A disponibilidade de verba nos 7 primeiros meses de obra é de R$ 70.000,00. Esse valor é suficiente para executar, totalmente, do item 1 até o
Considerando que nos quatro primeiros meses são executados do item 1 até o 5, o valor gasto, em reais, nesse período será de, aproximadamente,
As instruções técnicas para utilização de uma tinta indicam diluição a 20% na primeira demão e 10% na segunda demão. Sendo necessário pintar uma superfície de 600 m2, em duas demãos, as quantidades de tinta e de diluente, em litros, necessárias para a pintura serão, aproximada e respectivamente, de: Dados técnicos do rendimento após diluição:
Mistura diluída a 10%, rendimento 6 m2/litro. Mistura diluída a 20%, rendimento 8 m2/litro.É um tipo de vidro submetido a um tratamento térmico, considerado de segurança porque evita a ocorrência de acidentes graves. Em caso de quebra, seja qual for o ambiente, o vidro se fragmenta em pequenos pedaços de bordas pouco cortantes, minimizando o risco de ferimento profundo. Possui maior resistência à flexão que os vidros comuns e pode suportar diferenças de temperaturas de até 200 °C. A descrição refere-se ao vidro
Uma determinada argamassa de revestimento consome 150 kg de cimento por m3 de argamassa e será utilizada para revestir dois ambientes com espessura média do revestimento de 2 cm, sendo um com dimensões de 5 m x 8 m e 3 m de altura, e o outro com 6 m x 6 m e 3 m de altura. Considerando paredes e teto sem descontar os vãos, a quantidade de cimento, em kg, consumida para esse serviço será de, aproximadamente,
Para chapiscar um dos lados de uma alvenaria com 240 metros lineares por 2,5 de altura, utilizou-se uma argamassa misturada na proporção de 1 saco de cimento para 10 latas de areia, com rendimento de 60 m2 por saco de cimento. A quantidade de areia, em m3, admitindo que um m3 de areia corresponde a 50 latas, será de
Leia as afirmações sobre estruturas planas - vigas.
I. Estruturas que não são estáveis, não possuem equilíbrio estático, tendo por isso algum movimento (grau de liberdade) não restringido. II. Estruturas que têm o número de reações estritamente necessário para impedir qualquer movimento. As reações estão eficazmente dispostas de forma a restringir os possíveis movimentos da estrutura. III. Estruturas que têm um número de reações superior ao estritamente necessário para impedir qualquer movimento. Verifica-se, então, a possibilidade de, ao serem criteriosamente retiradas determinadas reações, essas estruturas continuarem a não apresentar movimento e serem, portanto, estáveis. Essas definições referem-se, respectivamente, a vigasLeia as definições de fundações diretas superficiais ou rasas.
I. Tipo de fundação em que a distribuição de carga para o terreno é considerada aproximadamente pontual, ou seja, onde houver pilar existirá um elemento de distribuição da carga do pilar para o solo. II. Tipo de fundação que apresenta uma distribuição de carga para o terreno tipicamente linear, por exemplo, uma parede que se apoia sobre esse tipo de fundação, sendo este o elemento que transmite a carga para o solo ao longo de todo o seu comprimento. III. Tipo de fundação que é constituída por um único elemento que distribui toda a carga da edificação para o terreno, constituindo-se em uma distribuição de carga tipicamente superficial. Essa fundação é praticamente uma laje de concreto armado, que distribui a carga total da edificação uniformemente pela área de contato. Essas definições são denominadas, respectivamente:Um bloco de concreto será construído sobre terreno com tensão admissível de 3 kgf/cm2, e deverá suportar uma carga de 24 300 kgf, proveniente de pilar de dimensões 20 x 20 cm de dimensão. Utilizando-se da expressão H=0,85*(B–b), o comprimento dos lados e a altura da base do bloco, medidos em cm, serão, aproximada e respectivamente:
Os instrumentos utilizados para medida do tempo de pega do cimento e da expansibilidade das pastas de cimento são denominados, respectivamente:
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