advances in construction technology (1)

8/10/2019 Advances in Construction Technology (1)

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C1/GROUP 5

Alejo, AllenDamian, Guillen

dela Cruz, Kathryn LaurenErasmo, Russel

Laboy, Jaira Ayn EraVilloria, Dayron Anthony

Engr. Ernesto C. Baldono, Jr.CE151P Ins t ruc to r


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Bio-binderFormulation as an

Asphalt Substitute


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Asphalt or flexible pavement is typically built with severallayers to form a layered system with better materials at thetop where the stress intensity is high and inferior materialsat the bottom where the stress intensity is low. The toplayer, called the surface course, is typically made of anasphalt mixture.

All types of failure or distress can be classified by whetherthey are structural or functional failures and loadassociated or non-load associated distresses.


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The use of bio-binder technology as a replacementto petroleum-based asphalt binders has gained

considerable attention in the recent years.

Most adhesives or binders that are used forpavement materials are derived primarily from fossil fuels .


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There is a drive to develop and produce bindersfrom alternative resources, particularly from bio-

renewable resources.

These bio-renewable resources are processed tobecome bio-oils.

The mixtures that form a bio-binder include bio-oils and polymer additives.


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Pre-treating a bio-oil by mechanical mixing at a

temperature of from about 100 C. to about 130 C. suchthat the bio-oil achieves a viscosity of less than about 3

Pas at a temperature of from about 100 C. to about 130C. and is equivalent to the bio-oil being mixed at a

temperature of from about 100 C to about 130 C toachieve an aging index of less than about 12 after from

about 2 to about 8 hours;

Adding a polymer additive to the pre-treated bio-oil;


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Heating the blend at a temperature of from about 100 C

to about 130 C; and

Treating the heated blend to a viscosity between about100 and about 1000 cps when measured in a rotationalviscometer at about 20 rpm and a temperature of from

about 100 C to about 130 C.


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Rusting Susceptibility: Hamburg Loaded-WheelTester

Moisture Resistance: Modified Lottman Test

Fracture Resistance: Semi-Circular Bending Test


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The results revealed that mixtures modified with bio-binder had similar or improved rutting performance .

With regards to moisture susceptibility; all mixturesexceeded the 80% tensile strength ratio .

Mixtures that contained bio-binder exhibited reduced

fracture resistance.

Bio-binder has improved the low temperature fracture performance of the mixtures .


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The benefits of this technology include a low cost asphalt bindersubstitute that performs as well as asphalt binders currentlybeing used.

Furthermore, the bio-binder likely lowers hot mix asphalt plantproduction temperatures, and thus reduces plant emissions.

Lastly, the bio-binder represents the development of greenmaterials/technologies that are renewable, and lessen thereliance on foreign crude oil.


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Porous Asphalt

Pavement


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The porous asphalt pavement technology is not

yet fully implemented in our country but our

government has the plans to employ it in thePhilippines.


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Porous pavement is a permeable pavement

surface with an underlying stone reservoir to

temporarily store surface runoff before itinfiltrates into the subsoil.

Porous asphalt and pervious concrete look thesame as traditional pavement from the surface,

but are manufactured without the fine particlesizes, and incorporate void spaces to allow

infiltration.


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Formulated with larger aggregate and less fineparticles.

Mixed at a standard asphalt plant.

Has an open -graded surface drains.


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Beneath its surface, underlying stone reservoirthat then filters water directly into the underlying

soil, or storm-drain system.


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Treats a low traffic or overflow parking area.

Some application on highways, where it iscurrently used as a surface material to reducehydroplaning.

Shoulders of roadways, runways, and airporttaxiways

Parking areas and pedestrian walkways


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It helps in flood control.

It recharges groundwater to underlying aquifers.

Reduced sprays from travelling vehicles, reducedroadway noise.

It allows for reduction of storm waterinfrastructure.


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Porous asphalt pavement requires routine

vacuum sweeping,

Construction stage sediment control is critical

advances in construction technology (1)

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