<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2012-07-02</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001529140</issuerCik>
        <issuerName>BlackRock Alternatives Allocation FB Portfolio LLC</issuerName>
        <issuerTradingSymbol>BAAP FB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001060021</rptOwnerCik>
            <rptOwnerName>BlackRock Holdco 2, Inc.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>55 EAST 52ND STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10055</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>Affil. of Investment Adviser</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2999000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes></footnotes>

    <remarks>On April 1, 2012, BlackRock Holdco 2, Inc. purchased 2,990,000 shares of the Issuer's common stock in the Issuer's initial public offering in order to provide the Issuer with seed capital. At the time of this purchase by BlackRock Holdco 2, Inc., BlackRock Holdco 2, Inc. also owned 9,000 shares of the Issuer's common stock, which it had purchased in a private placement as part of a transaction pursuant to which the Issuer was provided with net capital sufficient to meet the requirements of Section 14(a) of the Investment Company Act of 1940. Prior to July 2, 2012, BlackRock Holdco 2, Inc. and another affiliated entity were the Issuer's sole shareholders.</remarks>

    <ownerSignature>
        <signatureName>/s/ Aaron Wasserman as Director</signatureName>
        <signatureDate>2012-07-02</signatureDate>
    </ownerSignature>
</ownershipDocument>
