A cementitious slurry mixing and dispensing system (1510, 1710) comprising: a mixer (1520, 1712), the mixer (1520, 1712) adapted to agitate water and a cementitious material to form aqueous cementitious slurry; a discharge conduit (110, 1527, 1727), the discharge conduit (110, 1527, 1727) in fluid communication with the mixer (1520, 1712), the discharge conduit (110, 1527, 1727) made from a resiliently flexible material, the discharge conduit (110, 1527, 1727) extending along a longitudinal axis and having a first sidewall portion (251, 714, 914), a second sidewall portion (253, 715, 915) in spaced lateral relationship to the first sidewall portion (251, 714, 914) and an interior wall surface, the interior wall surface defining a slurry passage adapted to convey aqueous cementitious slurry therethrough; characterised by a pulser assembly (150, 850, 1050, 1250), the pulser assembly (150, 850, 1050, 1250) including first and second compression members (705, 905, 1105, 1305) and a drive mechanism (720, 920, 1120, 1320), the first and second compression members (705, 905, 1105, 1305) each extending along the longitudinal axis and being reciprocally movable over a range of travel between a neutral position, in which the first and second compression members (705, 905, 1105, 1305) contactingly engage, respectively, the first and second sidewall portions (251, 253, 714, 715, 914, 915) of the discharge conduit (110, 1527, 1727), and a compressed position, in which the first and second compression members (705, 905, 1105, 1305) are in compressing engagement with the discharge conduit (110, 1527, 1727) such that a portion of the interior wall surface underlying the first and second sidewall portions (251, 253, 714, 715, 914, 915), respectively, is flexed, the interior wall surface underlying the respective first an second sidewall portions (251, 253, 714, 715, 914, 915) being more flexed when the first and second compression members (705, 905, 1105, 1305) are respectively in the compressed position than when in the neutral position, and the drive mechanism (720, 920, 1120, 1320) being adapted to reciprocally move each of the first and second compression members (705, 905, 1105, 1305) over the range of travel between the neutral position and the compressed position. a mixer (1520, 1712), the mixer (1520, 1712) adapted to agitate water and a cementitious material to form aqueous cementitious slurry; a discharge conduit (110, 1527, 1727), the discharge conduit (110, 1527, 1727) in fluid communication with the mixer (1520, 1712), the discharge conduit (110, 1527, 1727) made from a resiliently flexible material, the discharge conduit (110, 1527, 1727) extending along a longitudinal axis and having a first sidewall portion (251, 714, 914), a second sidewall portion (253, 715, 915) in spaced lateral relationship to the first sidewall portion (251, 714, 914) and an interior wall surface, the interior wall surface defining a slurry passage adapted to convey aqueous cementitious slurry therethrough; characterised by a pulser assembly (150, 850, 1050, 1250), the pulser assembly (150, 850, 1050, 1250) including first and second compression members (705, 905, 1105, 1305) and a drive mechanism (720, 920, 1120, 1320), the first and second compression members (705, 905, 1105, 1305) each extending along the longitudinal axis and being reciprocally movable over a range of travel between a neutral position, in which the first and second compression members (705, 905, 1105, 1305) contactingly engage, respectively, the first and second sidewall portions (251, 253, 714, 715, 914, 915) of the discharge conduit (110, 1527, 1727), and a compressed position, in which the first and second compression members (705, 905, 1105, 1305) are in compressing engagement with the discharge conduit (110, 1527, 1727) such that a portion of the interior wall surface underlying the first and second sidewall portions (251, 253, 714, 715, 914, 915), respectively, is flexed, the interior wall surface underlying the respective first an second sidewall portions (251, 253, 714, 715, 914, 915) being more flexed when the first and second compression members (705, 905, 1105, 1305) are respectively in the compressed position than when in the neutral position, and the drive mechanism (720, 920, 1120, 1320) being adapted to reciprocally move each of the first and second compression members (705, 905, 1105, 1305) over the range of travel between the neutral position and the compressed position.