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Berkeley CIVENG 165 - THE CATHEDRAL OF CHRIST THE LIGHT PROJECT

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THE CATHEDRAL OF CHRIST THE CATHEDRAL OF CHRIST THE LIGHT PROJECTTHE LIGHT PROJECTPresented by:Presented by:Gustavo OrozcoGustavo OrozcoEmilio PerezEmilio PerezMichael PerezMichael PerezBackgroundBackgroundIn 1772, Father In 1772, Father Juan Juan CrespiCrespiled a mass led a mass celebration near Lake Merritt, which led celebration near Lake Merritt, which led to the creation of the Roman Catholic to the creation of the Roman Catholic Diocese of OaklandDiocese of OaklandCathedral of Saint Francis de Sales was Cathedral of Saint Francis de Sales was built in 1893, with a budget of $125,000built in 1893, with a budget of $125,000In 1962 the In 1962 the Cathedral of Saint Francis Cathedral of Saint Francis de Salesde Salesbecame the cathedral for the became the cathedral for the diocese of Oaklanddiocese of OaklandIt suffered major damage in the Loma It suffered major damage in the Loma PrietaPrietaEarthquake. It could not be Earthquake. It could not be repairedrepairedSignificance of CathedralSignificance of Cathedral““The history of St. Francis de The history of St. Francis de Sales reflects the history of our Sales reflects the history of our Diocese. Diocese. ……it served as a lively it served as a lively hub in Central Oakland and its hub in Central Oakland and its growing population for many growing population for many decadesdecades””The Cathedral of Christ the Light The Cathedral of Christ the Light will extend the legacy of St. will extend the legacy of St. Francis de Sales and will serve Francis de Sales and will serve the 500,000 Catholics and those the 500,000 Catholics and those who are in needwho are in needProject budget is $131 million, Project budget is $131 million, 20% of the cost is for the 20% of the cost is for the concrete.concrete.The Cathedral After ConstructionThe Cathedral After ConstructionEngineering and Engineering and construction is done construction is done by by WebcorWebcorBuilders Builders and and WebcorWebcorConcreteConcreteThe design of the The design of the Cathedral of Christ Cathedral of Christ the Light is based on the Light is based on a green building a green building (LEED). (LEED).Concrete SuppliersConcrete SuppliersThe concrete used on site is a readyThe concrete used on site is a ready--mix concrete, mix concrete, supplied by Central Concrete Supply Co. Inc., which supplied by Central Concrete Supply Co. Inc., which batches and delivers the concrete from a batch plant in batches and delivers the concrete from a batch plant in Oakland.Oakland.Three Types of Concrete UsedThree Types of Concrete UsedShotcreteShotcrete––Rarely used in this projectRarely used in this projectApplied on retaining walls, columns, and other nonApplied on retaining walls, columns, and other non--architectural surfaces.architectural surfaces.Conventional Concrete Conventional Concrete ––Constitutes most of the Constitutes most of the project siteproject siteApplied to retaining walls and other surfaces located Applied to retaining walls and other surfaces located in the base of the project site.in the base of the project site.SelfSelf--Consolidated Concrete (SCC) Consolidated Concrete (SCC) ––Main Main concrete mix used for the cathedralconcrete mix used for the cathedralApplied to the cathedralApplied to the cathedral’’s architectural walls and s architectural walls and WebcorWebcorBuilderBuilder’’s most interesting part of the job.s most interesting part of the job.SelfSelf--Consolidated Concrete Consolidated Concrete (SCC)(SCC)Type of concrete used by many countries Type of concrete used by many countries for over 20 years and is now a significant for over 20 years and is now a significant construction source for the United States construction source for the United States construction industryconstruction industryContains a really high flowContains a really high flow--ability and can ability and can spread any where in its path within a given spread any where in its path within a given formworkformworkSCC AdvantagesSCC AdvantagesMix can flow into really crowded areas where Mix can flow into really crowded areas where manual concrete pouring is unnecessarymanual concrete pouring is unnecessaryReduces amounts of construction equipment Reduces amounts of construction equipment and labor workand labor workLess Concrete Pumps needed since SCC can flow Less Concrete Pumps needed since SCC can flow easily throughout formworkeasily throughout formworkNo internal vibrators necessary, although external No internal vibrators necessary, although external vibrators are useful to obtain surface smoothnessvibrators are useful to obtain surface smoothnessCost, time, and labor difficulty is significantly reducedCost, time, and labor difficulty is significantly reducedProvides architectural elegance by promoting Provides architectural elegance by promoting smoothness to concrete walls (cathedral walls)smoothness to concrete walls (cathedral walls)SCC DisadvantagesSCC DisadvantagesU.S. construction crews have little or no U.S. construction crews have little or no experience in applying SCC to their concrete experience in applying SCC to their concrete projectsprojectsBatching, mixing, pouring, and curing methods Batching, mixing, pouring, and curing methods are more complex from methods used on are more complex from methods used on conventional concreteconventional concreteGenerating mix designs and standard Generating mix designs and standard specifications for SCC can be time consuming specifications for SCC can be time consuming due to its general unfamiliarity and its numerous due to its general unfamiliarity and its numerous revisions that have to be undertakenrevisions that have to be undertakenSCC Mix Design & StrengthsSCC Mix Design & StrengthsThe The SCCSCC’’ssmix design was not disclosed to us mix design was not disclosed to us due to security concerns of the concrete due to security concerns of the concrete supplier.supplier.Contains three main compressive strengths:Contains three main compressive strengths:4000 4000 psipsi––Used for slabUsed for slab--on grades and suspended on grades and suspended slabsslabs5000 5000 psipsi––Applied to all vertical work, such as the Applied to all vertical work, such as the cathedral wallscathedral walls8000 8000 psipsi––Used on seismic isolator slabs and Used on seismic isolator slabs and sanctuary slabs of concretesanctuary


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Berkeley CIVENG 165 - THE CATHEDRAL OF CHRIST THE LIGHT PROJECT

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